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: The film opens with narration over a silhouette of Hill House at night. The narrator, Dr. John Markway (Richard Johnson) tells us, "An evil old house, the kind some people call haunted is like an undiscovered country waiting to be explored. Hill House had stood for 90 years and might stand for 90 more. Silence lay steadily against the wood and stone of Hill House. Whatever walked there walked alone." Title and credits follow, then narration continues, "Scandal, murder, insanity, suicide: The history of Hill House was ideal. It had everything I wanted..." The house was built in New England by a man named Hugh Crain for his wife and young daughter. A horse and carriage accident took the life of the first Mrs. Crain (an uncredited Pamela Buckley) before she even saw the house. Hugh Crain (an uncredited Howard Lang) and young daughter, Abigail (an uncredited Janet Mansell) said a few words over the body, but Hugh was left an embittered man. Crain married again, and the second Mrs. Crain (an uncredited Freda Knorr) also died, falling down the main staircase. Hugh Crain left Abigail with a nurse (an uncredited Susan Richards) and went to England where he died in a drowning accident. Abigail kept the same nursery room her entire life. By the time she was eighty (an uncredited Amy Dalby) she was a bedridden invalid. Her nurse-companion (an uncredited Rosemary Dorken) was a local girl and, it is with this young companion the evil reputation of Hill House really begins. The old lady died while calling for help. The companion was trysting on the verandah with a farm hand. The companion inherited Hill House and occupied it for many years, but eventually hanged herself. The house then passed to a distant relative, named Mrs. Sanderson (Fay Compton).Markway visits Mrs. Sanderson where he convinces her to let him use the house for psychic research. He explains, "I shall occupy the house with a group of carefully selected assistants...I must have specially qualified help to take notes and document any evidence of the supernatural I may find." Eldridge Harper (Ronald Adam), Mrs. Sanderson's lawyer, voices his concern about publicity seekers and the propriety of having women in the house. Harper suggests to Mrs. Sanderson that her nephew, Luke, joins the doctor at Hill House, as he expects to inherit the property. Mrs. Sanderson asks point blank, "Exactly what do you and your assistants expect to find at Hill House?" Markway replies, "Maybe only a few loose floorboards, and maybe, I only say maybe, the key to another world."Dr. Markway, taking a leave of absence from his university professorship, finalizes his list of assistants. Only two end up accepting, Eleanor Lance and Theodora (no last name).Eleanor Lance (Julie Harris) is living with her sister. She is nearly broke and weary after looking after her invalid mother non-stop for eleven years. Mother is now dead, and she fights with her sister over just about everything. She begs to use the car, which is after all, half hers. Her brother-in-law, Bud Fredericks (an uncredited Paul Maxwell) tries to act as mediator between Eleanor and his wife, Carrie (Diane Clare). He is sympathetic to Eleanor's plight, but their daughter, Dora (an uncredited Verina Greenlaw) takes her cues from her mother, and taunts her Aunt Eleanor. On the vacation plan, Bud sides with Eleanor, "I think you should have a vacation, Nell." Carrie objects, but Eleanor is not to be deterred and she shows her family how she reacts when pushed to her breaking point. She is normally quiet and meek, but when pushed is loud and assertive.Nell decides to take the car and confronts the garage attendant (an uncredited Claude Jones) for the keys. She departs Boston along U.S. 50 and Route 238 to Hill House. We hear Nell thinking and she reveals she will never return to live with her sister. In fact, most of what we learn of Eleanor is hearing her thoughts.Eleanor 
 Question: What is the ghost's name?

Ex Output:
hugh crain


Ex Input:
Context: Konstantinos Raktivan (Greek: ; 1865 -- 21 May 1935) was a Greek jurist and politician, who served as cabinet minister, as the de facto first Governor-General of Macedonia, president of the Athens Bar Association and of the Council of State, Speaker of the Hellenic Parliament and member and president of the Academy of Athens. 
 Question: Who led Konstantinos Raktivan?

Ex Output:
academy of athens


Ex Input:
Context: Current therapies for Alzheimer's disease only treat the symptoms of the disease. We have previously developed a novel monoclonal antibody, 2B3, which binds to the -secretase cleavage site in amyloid precursor protein (APP) and reduces the production of amyloid- (A) in human cell lines. To determine whether the antibody was likely to be effective in mouse models of amyloid pathology in vivo, we investigated whether 2B3 could also bind to APP in mouse primary cortical neurones. Primary cortical neurones were produced from E15.5-17.5 C57Bl/6 wild-type and transgenic APP/V717I (London mutation) embryos. The percentage of the neuronal population was determined by immunocytochemistry. Cells were treated with 10 g/ml 2B3 or an irrelevant IgG for 48 h and A40 levels determined by ELISA. The population of cells was found to contain over 75% neurones and 2B3 bound effectively to these cells. No differences in A40 were detected between wild-type and transgenic cells. Importantly, 2B3 significantly inhibited the production of A40 by 75.151.37% of the media control, whereas an irrelevant IgG only significantly reduced A40 levels by 23.355.55% of the media control. The reduction in A40 produced by 2B3 was significantly greater than that caused by the IgG. These data indicate that 2B3 binds to APP in mouse neurones and can inhibit A40, similar to our previous findings. The antibody is probably therefore acting by steric hindrance of -secretase and these data suggest that it will be effective in mice in vivo and could be an alternative potential therapy for Alzheimer's disease. 
 Question: Which disease the London mutation involved in?

Ex Output:

alzheimer's disease