Input question: What nationality is tennis player Roger Federer?

Output answer: swiss

Input question: Whose madness presumably came about as the result of inhaling mercury fumes?

Output answer: mad hatter

Input question: What disease is caused by the Yersinia Pestis bacteria?

Output answer: bubonic plague

Input question: Rocinha favela in Brazil is said to be the biggest what in Latin America?

Output answer:
slum