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

Ex Input:
Context : After twelve years of marriage, Hannah Van Buren contracted tuberculosis and died on February 5, 1819, at the age of thirty-five.
Question : What illness did Hannah Van Buren suffer from?

Ex Output:
tuberculosis

Ex Input:
Context : Willie Earl Green was sent to prison in 1983 for the murder of a woman in a South Los Angeles crack house, but after a change in testimony, authorities released him from prison in March 2008.
Question : Which crime Willie Earl Green is considered to have commited?

Ex Output:
murder

Ex Input:
Context : The BMD-1 is a Soviet airborne amphibious tracked infantry fighting vehicle, which was introduced in 1969 and first seen by the West in 1970.
Question : In what year did BMD-1 enter service?

Ex Output:
1969