Generate a correct and concise answer for the question based on the words in the context.

Context : Otto Preminger died in New York City, New York in 1986, aged 80, from lung cancer while suffering from Alzheimer's disease. 
Question : What medical condition did Otto Preminger have at the end of his life?
Alzheimer's disease

Context : The QBZ-95 was first observed outside China on 1 July 1997, when the United Kingdom transferred the sovereignty of Hong Kong to the People's Republic of China. 
Question : What year was QBZ-95 commissioned?
1997

Context : Robert Sorrells (born June 29, 1930) is a former film and television character actor, who is serving an indeterminate life sentence for the crimes of murder and attempted murder. 
Question : Which crime led to the conviction of Robert Sorrells?

murder