TASK DEFINITION: Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
PROBLEM: Context: One day Mr. White gave his wife ten pounds for her birthday -- ten new pound notes. So Mrs. White went out shopping. She waited for a bus, got on it and sat down next to an o1d 1ady. After a while, Mrs. White noticed that the old 1ady's handbag was open. Inside it, she saw a wad of pound notes exactly like the ones her husband had given her. So she quickly looked into her own bag -- the notes had gone! Mrs. White was sure that the o1d lady next to her had stolen them. She immediately thought of calling the police. But as she disliked making a fuss , she decided to take back the money from the old 1ady's hand bag and say nothing about it. She looked around to make sure nobody was watching. Then she carefully put her hand into the o1d lady's bag, took the notes, and put them into her own handbag. When she got home that evening, Mrs. White showed her husband the beautiful hat she had bought. "How did you pay for it?" Mr. White asked. "With the money you gave me for my birthday, of course" she answered. "Oh? What's that, then?" he asked, as he pointed to a wad of pound notes on the table. 
 Question: What did Mrs. White use the money given by her husband for?

SOLUTION: nothing.

PROBLEM: Context: Change in gene expression associated with pancreatic cancer could be attributed to the variation in histone posttranslational modifications leading to subsequent remodeling of the chromatin template during transcription. However, the interconnected network of molecules involved in regulating such processes remains elusive. hPaf1/PD2, a subunit of the human PAF-complex, involved in the regulation of transcriptional elongation has oncogenic potential. Our study explores the possibility that regulation of histone methylation by hPaf1 can contribute towards alteration in gene expression by nucleosomal rearrangement. Here, we show that knockdown of hPaf1/PD2 leads to decreased di- and tri-methylation at histone H3 lysine 4 residues in pancreatic cancer cells. Interestingly, hPaf1/PD2 colocalizes with MLL1 (Mixed Lineage Leukemia 1), a histone methyltransferase that methylates H3K4 residues. Also, a reduction in hPaf1 level resulted in reduced MLL1 expression and a corresponding decrease in the level of CHD1 (Chromohelicase DNA-binding protein 1), an ATPase dependent chromatin remodeling enzyme that specifically binds to H3K4 di and trimethyl marks. hPaf1/PD2 was also found to interact and colocalize with CHD1 in both cytoplasmic and nuclear extracts of pancreatic cancer cells. Further, reduced level of CHD1 localization in the nucleus in hPaf1/PD2 Knockdown cells could be rescued by ectopic expression of hPaf1/PD2. Micrococcal nuclease digestion showed an altered chromatin structure in hPaf1/PD2-KD cells. Overall, our results suggest that hPaf1/PD2 in association with MLL1 regulates methylation of H3K4 residues, as well as interacts and regulates nuclear shuttling of chromatin remodeling protein CHD1, facilitating its function in pancreatic cancer cells. 
 Question: Which is the histone residue methylated by MLL1?

SOLUTION: h3k4

PROBLEM: Context: In Egypt, circa 1290 BC, high priest Imhotep engages in an affair with Anck-su-Namun, the mistress of Pharaoh Seti, despite strict rules that other men are forbidden to touch her. When the Pharaoh discovers their tryst, Imhotep and Anck-su-Namun murder the monarch. Imhotep is dragged away by his priests before the Pharaoh's guards can discover his involvement; Anck-su-Namun then kills herself, intending for Imhotep to resurrect her. After Anck-su-Namun's burial, Imhotep breaks into her crypt and steals her corpse. He and his priests flee across the desert to Hamunaptra, the City of the Dead, where they begin the resurrection ceremony. However, they are caught by Seti's guards before the ritual could be completed, and Anck-su-Namun's soul is sent back to the Underworld. For their sacrilege, Imhotep's priests are mummified alive, and Imhotep himself is forced to endure the curse of Hom Dai: his tongue is cut out and he is buried alive with a swarm of flesh-eating scarabs. The ritual curses him to become an immortal walking plague if he were ever to be resurrected. He is buried under high security, sealed away in a sarcophagus below a statue of the Egyptian god Anubis, and kept under strict surveillance throughout the ages by the Medjai, descendants of Seti's palace guards. If Imhotep were ever to be released, the powers that made him immortal would allow him to unleash a wave of destruction and death upon the Earth.In 1923, soldiers from the French Foreign Legion, led by American Rick O'Connell, make a final stand at Hamunaptra against an overwhelming force of Medjai warriors. The soldiers are massacred and O'Connell makes a final retreat inside the city, only to be cornered by a group of Medjai. However, they flee when Imhotep's evil presence manifests itself, leaving him to die in the desert.In 1926, Cairo librarian and aspiring Egyptologist, Evelyn Carnahan is presented with an intricate box and map by her bumbling brother Jonathan, who says he found it in Thebes. The map seems to point the way to the lost city of Hamunaptra, where all of the wealth of Egypt was supposedly stored; however, the museum curator, Dr. Bey, dismisses Hamunaptra as a myth, and accidentally damages the map. Jonathan reveals he actually stole it from an American (revealed to be O'Connell), who is currently in prison, and may be able to tell more about Hamunaptra. Rick tells them that he knows the location of the city from his days in the Foreign Legion. He makes a deal with Evelyn to reveal the location of Hamunaptra, in exchange for Evelyn saving Rick from being hanged. Evelyn successfully negotiates his release from the prison warden by offering him 25% of the found treasure; however, the warden insist on coming along in order to protect his investment. They board a ship to start their expedition to the city, where they encounter a band of American treasure hunters led by the famed Egyptologist Dr. Allen Chamberlain, and guided by Beni Gabor, a cowardly former Legion soldier who served with Rick and also knows the location of the lost city.During the journey, the boat is invaded by Medjai soldiers who are looking for Evelyn's box and the map. The expedition manages to fight them off, but the map is lost and the boat goes up in flames, forcing the entire party to go ashore. Rick, Evelyn and Jonathan are separated from the other treasure hunters and procure camels at a nearby market. Since Rick knows the way to the city, they arrive at Hamunaptra at the same time as the other party, but due to tensions between the two groups, they start exploring the city in separate locations. The Americans discover a chest between the legs of the statue of Anubis. They have it opened by several of their carriers, but the chest is booby-trapped and the carriers die from an acid spray. In the meanwhile, Evelyn is looking for the Book of Amun-Ra, a solid gold book supposedly capable of taking life away. Her team discovers a tomb buried directly below the statue of Anubis 
 Question: Who attacks the expeditions?

SOLUTION:
the medjai