Unlimiformer: Long-Range Transformers with Unlimited Length Input — part 4/4

Cleaned-text code points [47839, 60487). Bibliography omitted here; source.md includes it.

 crazy, the court does not believe him. Suddenly, at the end of the trial, Katerina stands up again, showing a letter from Dmitri that clearly states Dmitri’s intention to kill Fyodor as a last resort. She has a change of heart and no longer wants to lie to protect a man who has hurt her so much. Word comes to the courtoom that Smerdyakov has hanged himself. After final statements are made, the verdict comes back: guilty. Dmitri is sentenced to jail. Dmitri welcomes this chance to become a new man, but he does not want to be in exile in Siberia for the rest of his life; he wants to return to his home country before he dies. Ivan is still sick, and Katerina takes care of him. Alyosha visits the boys with whom he has become friends. They are sad because Ilusha has died. Alyosha passes along Father Zossima’s teachings of love and understanding, and they all embrace his words, cheering him.

BART (with input truncated to 1024) summary: Fyodor Pavlovitch Karamazov, a landowner in his own day, lives with his three sons, Adelaida Ivanovna and Alexey. He is the son of the landowner, Fyodor, and his wife, Adele, are the daughters of a wealthy nobleman in the district. Adele is the daughter of a nobleman, and her father, Ivanovitch, is a prominent figure in the town. She is a beautiful, intelligent, and intelligent young woman, who is destined to be a great writer. She has a great deal of ambition, and she is determined to achieve her goals. However, her ambition is short-lived. She falls in love with a handsome young man named Ivanovn, who has recently returned from a trip to the Congo. He has a lot of money, but he is also a poor man, and he has no means of earning it. In fact, he is a miserly beggar, and so he spends most of his time trying to earn money from the poor. He also has a wife, a beautiful young girl, who he marries, and a young son, Ivan, who lives with him. He and Adele have two children, Ivan and Aleksey, and they are very happy, but they have a problem: Ivan is a poor beggar who is unable to pay his rent, and Aleksandra is a beggar. Ivan is very ill, so he is forced to sell his estate to a rich man named Vladimir. Vladimir is a rich, well-to-do man who is also rich, but who is not well-liked by the people who live in the neighborhood. Vladimir’s wife, Evgeny, is also ill, and Vladimir’s son, Pavel, is very sick. Vladimir has a bad case of typhus fever, which causes him to lose his job and his money. Vladimir, Pavel’s younger brother, is sick, and Pavel is sent to the hospital to recover his father’s condition. Pavel is also sick and dies, and Ivan is left to care for him. The next day, Pavel and Adelayna are reunited with their father, who died in a typhus epidemic in the country. Pavel’s father, Vladimir, has died, and the family is now in mourning. Pavel has been unable to find a new wife, so the family decides to send him to Moscow, where he will be reunited with his father. The family is devastated, but Pavel is able to find an old friend, a young man who has just returned from the Congo, who will be able to help him. Pavel and Ivan are devastated by the loss of his father, but Ivan and Vladimir are able to make amends with Vladimir. Pavel, however, is devastated by this news, and, after a long period of mourning, he decides to return to Moscow. He returns to Moscow to find his father dead, and to find that his father has died. He then goes to Moscow and is buried in the city cemetery, where his father is buried. Pavel dies of a heart attack, and then he is buried with his mother. He was a young, beautiful, and beautiful woman who was raised by a kindly, kind, and generous family. He had a great time with his family, but his life was cut short when his father died. Pavel was left to live with his aunt and uncle in Moscow, and when he died, he was left alone with his uncle and his two sons. He died in Moscow and his mother, who had been living with him in a convent, died in the same convent. Pavel had been a poor, poor, and ill-treated man, but now he was able to raise his son and raise his own son. Pavel survived, and now he lives in Moscow with his Aunt and Uncle. He lives with their aunt and Uncle, who are very poor and poor. They live in a small house in the countryside, and their children are raised by their uncle and aunt. They have a great love for each other, but their love for one another is not reciprocated. Pavel also dies in the convent, and after a brief illness, Pavel is left with a broken heart. He dies in Moscow. His father, a wealthy man, is the father of his son, who was also a clergyman. Pavel died of a stroke in the hospital, and was buried in a nearby cemetery. He left Pavel and his family behind. Pavel tried to help Pavel, but was unable to save him, so Pavel was forced to leave Moscow. Pavel returned to Moscow in the middle of the night. He tried to save Pavel’s life, but it was too late for Pavel. Pavel managed to escape, and in the end, Pavel was killed by a bullet. Pavel took Pavel’s body and died of his own wounds. Pavel left Pavel to die in the forest. Pavel stayed with the family for a few years, until he died of an illness. Pavel became ill and Pavel was sent to

Unlimiformer summary: The first part of the novel focuses on the question of whether or not the Russian nobleman, Dmitri Fyodorovitch, has killed his father. In the town of Ivanovna, the lieutenant-colonel of the Mushenkhanovitch is accused of the murder of his brother Ivanovitch. The lieutenant-in-command, Vasilyevitch, takes the form of a dog, and the two men–the two men and the woman who are questioned by the court-martial–murphy. The two men cry out to the God of Russia for help in their quest to save the town. The man, afraid of the wrath of the God, hands the dog a bunch of letters that are supposed to be proof of his love for his brother. The old man–the one who had killed his mother, and then found the letter–arrives. He reads it–asked the old man to forgive him for the murder and then takes the dog away. The other men, all of whom are prisoners, demand that the man confess his crime to the court. The first and most important thing they tell the court is that they love the man. The court acquits the man and sentences the man to death. The second man–an old officer of the town, Alekandrovitch–askes to tell them the same thing. The third man–in the process of confessing his crime–is Vashenka, a drunk man who has been sent to the town to kill his father, for reasons which are not entirely clear to the people. The woman’s servant, Evgenyevna, is also the one who has told the court the story of the Medvedevitch’s murder, for the good old man’s and the young man’s love. The three men, who are separated for the first time, are laughing at the man’s attempt to seduce Mitya. The young man, in the meantime, is conscripted into the town-side. He tells the court that he loves her, but he has yet to tell her the true story. The men, in this room, demand a man to kill her, and she will not betray them. The women, in their own country, are rebelling against the man who had sent them three thousand roubles, and they will not allow the man of the people to see them. They will not let the man in the town be allowed to see the man–or Dmitriovitch; he will have her husband killed him. He will not tell the people who love him. The next man, named Vashenovitch, arrives, and takes the man away. They all begin to laugh at the fact that he has succeeded in seducing and entrusting his brother Dmitri. He is then taken away to the old woman’s house, where the governor-side-of-the-world, and his sister, Arkadin, is being punished. The priestesses and the baron are shocked, for they have been so virtuous and well-suited. The only thing they will be able to do is kill the priest. They threaten to burn the priestess to death, for she has been so wicked and libidinous that she has not yet seen the priest, for her husband. The priests–ostensibly convinced that she is a woman who loves the priest and has been punished for her love and for allowing the priest to marry her. The last man, Yakivitch, arrives at the house, and, after a long day of drinking and then some of the men–is killed. He and the priest are ordered to leave the town so that the priest can finally be reunited with the people of the old lady. The final man, the commander of the St. Petersburg town of Arkadina, is sentenced to death for the crime of having killed and then the lieutenant of the governor, for taking the money. The commander, the former lieutenant-delegation of the People’s Army, is summarily executed, and all the men, except for the commander, have been summarily punished for their crime. The entire town is shocked and, in a very dramatic way, the priestesses plead for the forgiveness of the man, for allowing them to kill and imprison Ivan. They plead for their brother to be restored as well, for all the people they have loved, and for the priestor to tell the story.

## Appendix G Additional Related Work

Long-document summarization Prior work has proposed several strategies for long-document summarization. In particular, many methods select a subsection of input to summarize using TF-IDF ( Liu* et al., 2018 ) , smaller retriever models ( Liu and Lapata, 2019 ) , or sentence similarity metrics ( Bajaj et al., 2021 ) . An orthogonal approach is to summarize chunks of the input, then combine and condense these sub-summaries into a global summary, either using vanilla transformer models ( Kryściński et al. (2021) , Zhang et al. (2022) , ( Zhang et al., 2021 ) ) or a specialized architecture ( Liu and Lapata (2019) , Grail et al. (2021) ). Other work has focused on expanding the amount of text that can be processed, by applying long-context transformers or developing new long-context methods ( Huang et al., 2021 ) . However, these methods all suffer from cascading errors: if the initial trimming or chunk summarization steps remove important information, there is no way to recover that information in the downstream summary.

Retrieval-augmented transformers Interpolating language model probabilities with nearest neighbors retrieval from an external datastore was originally proposed by Khandelwal et al. (2019) . Additional work in this space has improved the selection of neighbors ( Drozdov et al., 2022 ) or added structure to the datastore ( Alon et al., 2022 ) . Despite the shared use of retrieval, all these works retrieve from an external datastore, while Unlimiformer retrieves from a single input example, independently from external cumbersome sources. Borgeaud et al. (2022) incorporate retrieval from the external datastore into the architecture, which requires pretaining the model from scratch; in contrast, Unlimiformer leverages any already-pretrained model, and thus can be applied to future models as well.

Other efficient processing methods Outside of retrieval, many other works have attempted to combine inputs encoded across multiple context windows to process long inputs. This may be achieved by running the model over sliding windows (and using clustering to permute information between windows) ( Wang et al., 2021 ) ; by learning a pooling operation over a set of independently-encoded examples ( Lee et al., 2019 ) ; by attending over clusters of embeddings ( Vyas et al., 2020 ) ; by learning a retriever to determine a subset of embeddings to attend to ( Qin and Durme, 2023 ) ; by performing fusion in-decoder ( Ivgi et al., 2022 ) ; or by using bucketed local attentions with hashing Kitaev et al. (2020) . Most of these methods either modify the architecture or introduce additional trainable components.

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