input question: Generate a question that has the following answer: Emperor Penguin for the following movie plot: When Mumble is born into a colony of Emperor penguins, he finds himself unable to be accepted by all other penguins, lacking the ability to sing a heartsong - a mating song which all penguins can perform from an early age. He does however have a talent for tap dance which is derided by his peers and scorned by the penguin elders as displeasing to their deity. Mumble's gift of dance is blamed for the possible cause of their food shortage, which is in reality caused by nearby trawlers depleting local fish stocks. After being virtually outcast by his colony he goes in search of the humans in an attempt to reason and communicate with them.???
output answer: What type of penguin is Mumble?

Generate a question that has the following answer: Sarah for the following movie plot: In 1939, Lady Sarah Ashley travels from England to northern Australia to force her philandering husband to sell his faltering cattle station, Faraway Downs. Her husband sends an independent cattle drover, called "Drover", to transport her to Faraway Downs. Lady Sarah's husband is murdered shortly before she arrives, and the authorities tell her that the killer is an Aboriginal elder, "King George". Meanwhile, cattle station manager Neil Fletcher is trying to gain control of Faraway Downs, so that Lesley 'King' Carney will have a complete cattle monopoly, giving him negotiating leverage with an Australian army officer, Captain Dutton, who wants to buy the cattle. The childless Lady Sarah is captivated by the boy Nullah, who has an Aboriginal mother and a white father. Nullah tells her that he has seen her cattle being driven onto Carney's land in other words, stolen from her. Because of this Fletcher mistreats Nullah and threatens him and his mother, so Lady Sarah fires Fletcher and decides to try to run the cattle station herself. When Nullah and his mother hide from the authorities in a water tower, his mother drowns. Lady Sarah comforts Nullah by singing the song "Over the Rainbow" from the film The Wizard of Oz. Nullah tells her that "King George" is his grandfather, and that like the Wizard, he too is a "magic man". Lady Sarah persuades Drover to take the cattle to Darwin for sale. Drover is friendly with the Aborigines, and therefore shunned by many of the other whites in the territory. It is revealed that he was married to an Aboriginal woman, who died after being refused medical treatment in a hospital because of her race. Lady Sarah also reveals she is unable to have children. Drover leads a team of six other riders, including Lady Sarah, Drover's Aboriginal brother-in-law Magarri, Nullah, and the station's accountant Kipling Flynn, to drive the 1,500 cattle to Darwin. They encounter various obstacles along the way, including a fire set by Carney's men that scares the cattle, resulting in the...
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Answer: who is captivated by the boy Nullah?

Problem: Given the question: Generate a question that has the following answer: DiCaprio for the following movie plot: As a child, Colin Sullivan (Damon) had been introduced to organized crime by Irish-American mobster Frank Costello (Nicholson) in the Irish neighborhood of South Boston. Over the years, Costello grooms him to become a mole inside the Massachusetts State Police, until Sullivan is accepted into the Special Investigations Unit, which focuses on organized crime. Before graduating from the police academy, Billy Costigan (DiCaprio) is recruited by Captain Queenan (Sheen) and Staff Sergeant Dignam (Wahlberg) to go undercover, as his family ties to organized crime make him a perfect infiltrator. He drops out of the academy and does time in prison on a fake assault charge to increase his credibility. Each man infiltrates his respective organization, and Sullivan begins a romance with police psychiatrist Madolyn Madden (Farmiga). Costigan is seeing her under the terms of his probation, and they begin a relationship, too. After Costello escapes a sting operation, each mole becomes aware of the other's existence. Sullivan is told to find the "rat" and asks Costello for information to identify the informer. Costigan follows Costello into a porn theater, where Costello gives Sullivan an envelope containing personal information on his crew members. Costigan chases Sullivan through Chinatown. When it is over, neither man knows the other's identity. Sullivan has Queenan tailed to a meeting with Costigan on the roof of a building. Queenan orders Costigan to flee while he confronts Costello's men alone. The men then throw Queenan off the building to his death. When they exit, Costigan pretends he has come to join them. Television news reveals that crew member Delahunt (Rolston) has been an undercover cop, working for the Boston Police Department. Dignam resigns rather than work with Sullivan, who he suspects is the mole after he is asked why he had Queenan followed. Using Queenan's phone, Sullivan reaches Costigan, who refuses to abort his mission. Sullivan learns from Queenan's diary of Costello's role as an informant for the...
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The answer is:
Who plays Billy?