Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
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Question: Context : Otto Preminger died in New York City, New York in 1986, aged 80, from lung cancer while suffering from Alzheimer's disease.
Answer : Alzheimer's disease

Answer: What led to Otto Preminger's death?

Question: Context : Robert Sacre (born June 6, 1989) is a professional basketball player for the Los Angeles Lakers of the National Basketball Association (NBA).
Answer : Los Angeles Lakers

Answer: What team did Robert Sacre play for?

Question: Context : Matthias Billen (29 March 1910 -- 1 July 1989) was a German international footballer.
Answer : 1 July 1989

Answer:
When did Matthias Billen's death occur?