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.

Ex Input:
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?

Ex Output:
h3k4


Ex Input:
Context: John Strangways, the British Intelligence (SIS) Station Chief in Jamaica, is ambushed, killed, and his body taken by three assassins known as the "Three Blind Mice". In response, MI6 agent James Bond (007) is summoned to the office of his superior, M. Bond is briefed to investigate Strangways' disappearance and to determine whether it is related to his cooperation with the American Central Intelligence Agency (CIA) on a case involving the disruption of Cape Canaveral rocket launches by radio jamming.Upon his arrival at Kingston Airport, a female photographer tries to take Bond's picture and he is shadowed from the airport. He is picked up by a chauffeur, who Bond determines to be an enemy agent. Bond instructs him to leave the main road and, after a brief fight, Bond starts to interrogate the driver, who then kills himself with a cyanide-embedded cigarette.During his investigation Bond sees a picture of a boatman named Quarrel with Strangways. Bond locates Quarrel but finds him to be un-cooperative when he interviews him. Bond also recognises Quarrel to have been the driver of the car that chased him from the airport. Bond follows Quarrel and is about to be beaten by him and a friend when the fight is interrupted by the man from the airport who has been following Bond: he reveals himself to be CIA agent Felix Leiter and that not only are the two agents on the same mission, but also that Quarrel is helping Leiter. The CIA has traced the mysterious radio jamming of American rockets to the Jamaica vicinity, but aerial photography cannot see the exact location of its origin. Quarrel reveals that he has been guiding Strangways around the nearby islands to collect mineral samples. He also tells about the island of Crab Key, owned by the reclusive Dr. No, who operates a bauxite mine which is rigorously protected against trespassers by an armed security force and low-scan radar.After finding a receipt in Strangways' house about mysterious rocks naming, Professor R.J. Dent, Bond meets with Dent who says he had assayed the samples for Strangways and determined them to be ordinary rocks. This visit makes Dent wary and he takes a boat to Crab Key where Dr. No expresses displeasure at Dent's failure to kill Bond and orders him to try again, this time with a large venomous spider. Bond survives and kills the spider.Bond becomes friendly with Strangways' secretary, Miss Taro and agrees to meet her at her home in the hills above Kingston. While driving there, Bond is attacked by several men driving a large hearse. He is able to outmaneuver them and the hearse is run off the mountain road and explodes. When Bond shows up at Taro's house, she's surprised to see him, a fact that Bond notes easily. She goes into her bedroom and talks on the phone to her boss, who tells her to keep Bond occupied for a few hours. Bond and Taro spend that time in bed.Bond makes a phone call, ostensibly asking for a taxi but actually talking to the local police, who show up soon after and arrest Taro. Bond then sets a trap for Dent and waits for him to show. Dent steals into the bedroom and fires several silenced shots into the bed, which Bond rigged to look like it was occupied. Bond forces Dent to drop his pistol and begins to interrogate him about Strangways and his radioactive rock samples, which Dent tried to cover up. Dent is able to recover his pistol, finding it empty and Bond coldly shoots him dead.Having detected radioactive traces in Quarrel's boat, where Strangways' mineral samples had been, Bond convinces a reluctant Quarrel to take him to Crab Key. On the beach there, Bond meets the beautiful Honey Ryder, dressed only in a white bikini, who is collecting shells. At first she is suspicious of Bond but soon decides to help him, leading them all inland to an open swamp. After nightfall they are attacked by the legendary "dragon" of Crab Key which turns out to be a flame-throwing armoured vehicle. In the resulting gun battle, Quarrel is incinerated by the flame-thrower whilst Bond and Honey are 
 Question: who finds a receipt?

Ex Output:
bond


Ex Input:
Context: Sir Wilfred Robarts, a famed barrister, has just been released from the hospital in which he stayed for two months following a heart attack. Returning to his practise of law, he takes the case of Leonard Vole, an unemployed man who is accused of murdering his elderly friend, Mrs. Emily French. Vole claims he's innocent, although all evidence points to him as the killer, but his alibi witness, his cold German wife Christine, instead of entering the court as a witness for the defense, becomes the witness for the prosecution and defiantly testifies that her husband is guilty of the murder. Sir Wilfred believes there's something suspicious going on with the case, particularly with Mrs. Vole. 
 Question: How long did Sir Wilfred Robarts stay at the hospital?

Ex Output:

two months