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 Q]: Context: The film depicts the construction and ultimate demolition of a metaphorical wall. Though the film's symbolism is open to interpretation, the wall itself clearly reflects a sense of isolation and alienation.Pink (Bob Geldof), the protagonist (and unreliable narrator) of the film, is a rock star, one of several reasons behind his apparent depressive and detached emotional state. He is first seen in a quiet hotel room, having trashed it. The opening music is not by Pink Floyd, but is the Vera Lynn recording of "The Little Boy that Santa Claus Forgot". During the following scenes, it is revealed that Pink's father, a British soldier, was killed in action during World War II during Pink's infancy. The reference is almost certainly to the death of Roger Waters' real-life father, Eric Fletcher Waters, who died in combat in Italy during Operation Shingle (the Battle of Anzio) in February 1944.The movie then flashes back to Pink as a young English boy growing up in the early 1950s. Throughout his childhood, Pink longs for a father figure after he learns his father died in the war. At school, he is humiliated by his mean and stern teacher for writing poems in class. The poems that the teacher seizes from him and reads aloud are lyrics from "Money" from the Pink Floyd album Dark Side of the Moon. Pink is also affected by his overprotective mother who spoils him by giving him whatever he wants.As an adult, Pink eventually gets married as his fame as a rock star grows, but he and his wife grow apart and she has an affair while Pink is on tour. When Pink learns of the affair, he compensates with expensive materialistic possessions and turns to a willing groupie (Jenny Wright), whom he brings back to his hotel room only to trash it in a fit of violence, causing her to flee the room in terror.Pink slowly begins to lose his mind to metaphorical "worms". He shaves off all of his body hair (an incident inspired by former bandmate Syd Barrett, who appeared at a 1975 recording session of Wish You Were Here, having shaved his eyebrows and body hair) and, while watching The Dam Busters on television, morphs into his neo-Nazi alter-ego. Pink's manager (Bob Hoskins), along with the hotel manager (Michael Ensign) and some paramedics, break into the hotel room and discover Pink. They take him away into a waiting limousine outside the hotel and inject him with drugs to enable him to perform.The drugs cause Pink to hallucinate and he fantasises that he is a neo-Nazi dictator, his concert is a rally. His followers proceed to attack ethnic minorities and rape the white girlfriend of a black man. Later, Pink holds a rally in suburban London, singing "Waiting for the Worms". The scene is inter-cut by images of animated marching hammers that goose-step across ruins.Pink screams "Stop!" and takes refuge in a bathroom stall at the concert venue, reciting poems which would later be used as lyrics on Pink Floyd's "Your Possible Pasts" from The Final Cut album and "5:11 AM (The Moment Of Clarity)" from Roger Waters' The Pros and Cons of Hitch Hiking.In a climatic animated sequence, Pink puts himself on trial. He is depicted as a small, pink rag doll that rarely moves. The judge is a giant pair of buttocks, with two backward facing legs, an anus for a mouth and a scrotum for a chin. The lawyer is a tall, menacing, vulturelike man and the schoolmaster is an abusive, hateful marionette. After hearing from the parties and witnesses (Pink's wife and mother), the judge orders the wall to be torn down. The wall explodes and shows a montage of events from the entire film.The film concludes with three children cleaning up a pile of debris after an earlier riot. It is unknown whatever has happened to Pink, leaving the viewer to decide. 
 Question: What kind of doll is Pink depicted as?
[EX A]: small pink rag doll that rarely moves

[EX Q]: Context: Energy from the Sun comes from the lightest element, hydrogen, fusing together to create the second lightest element, helium. Nuclear fusion on the Sun releases tremendous amounts of solar energy. The energy travels to the Earth, mostly as visible light. The light carries the energy through the empty space between the Sun and the Earth as radiation. Solar energy has been used for power on a small scale for hundreds of years, and plants have used it for billions of years. Unlike energy from fossil fuels, which almost always come from a central power plant or refinery, solar power can be harnessed locally (Figure 1.1). A set of solar panels on a homes rooftop can be used to heat water for a swimming pool or can provide electricity to the house. Societys use of solar power on a larger scale is just starting to increase. Scientists and engineers have very active, ongoing research into new ways to harness energy from the Sun more efficiently. Because of the tremendous amount of incoming sunlight, solar power is being developed in the United States in southeastern California, Nevada, and Arizona. Solar panels supply power to the Interna- tional Space Station. Solar power plants turn sunlight into electricity using a large group of mirrors to focus sunlight on one place, called a receiver (Figure 1.2). A liquid, such as oil or water, flows through this receiver and is heated to a high temperature by the focused sunlight. The heated liquid transfers its heat to a nearby object that is at a lower temperature through a process called conduction. The energy conducted by the heated liquid is used to make electricity. This solar power plant uses mirrors to focus sunlight on the tower in the center. The sunlight heats a liquid inside the tower to a very high temperature, producing energy to make electricity. Solar energy has many benefits. It is extremely abundant, widespread, and will never run out. But there are problems with the widespread use of solar power. Sunlight must be present. Solar power is not useful in locations that are often cloudy or dark. However, storage technology is being developed. The technology needed for solar power is still expensive. An increase in interested customers will provide incentive for companies to research and develop new technologies and to figure out how to mass-produce existing technologies (Figure 1.3). Solar panels require a lot of space. Fortunately, solar panels can be placed on any rooftop to supply at least some of the power required for a home or business. This experimental car is one example of the many uses that engineers have found for solar energy. Click image to the left or use the URL below. URL: Click image to the left or use the URL below. URL: 
 Question: the source of solar power is nuclear
[EX A]: fusion.

[EX Q]: Context: Amyloid precursor protein (AbetaPP), a precursor of amyloid beta (Abeta) peptide, is one of the molecules involved in the pathogenesis of Alzheimer's disease (AD). Specific mutations in AbetaPP have been found in patients inheriting familial AD (FAD). These mutant AbetaPP proteins cause cell death in neuronal cell lines in vitro, but the molecular mechanism of cytotoxicity has not yet been clarified completely. We analyzed the cytotoxic mechanisms of the London-type AbetaPP mutant, V642I-AbetaPP, in primary cortical neurons utilizing an adenovirus-mediated gene transfer system. Expression of V642I-AbetaPP protein induced degeneration of the primary neurons. This cytotoxicity was blocked by pertussis toxin, a specific inhibitor for heterotrimeric G proteins, Go/i, and was suppressed by an inhibitor of caspase-3/7 and an antioxidant, glutathione ethyl ester. A specific inhibitor for NADPH oxidase, apocynin, but not a xanthine oxidase inhibitor or a nitric oxide inhibitor, blocked V642I-AbetaPP-induced cytotoxicity. Among mitogen-activated protein kinase (MAPK) family proteins, c-Jun N-terminal kinase (JNK) and p38MAPK, but not extracellular regulated kinase (ERK), were involved in this cytotoxic pathway. The V642I-AbetaPP-induced cytotoxicity was not suppressed by two secretase inhibitors, suggesting that Abeta does not play a major role in this cytotoxicity. Two neuroprotective factors, insulin-like growth factor I (IGF-I) and Humanin, protected these primary neurons from V642I-AbetaPP-induced cytotoxicity. Furthermore, interleukin-6 and -11 also attenuated this cytotoxicity. This study demonstrated that the signaling pathway activated by mutated AbetaPP in the primary neurons is the same as that by the other artificial insults such as antibody binding to AbetaPP and the artificial dimerization of cytoplasmic domain of AbetaPP. The potential of neurotrophic factors and cytokines in AD therapy is also indicated. 
 Question: Which disease the London mutation involved in?
[EX A]:
alzheimer's disease