instruction:
Generate a correct and concise answer for the question based on the words in the context.
question:
Context : Wanda Jean Allen (August 17, 1959 -- January 11, 2001) was sentenced to death in 1989 for the murder of Gloria Jean Leathers, 29. 
Question : Which crime led to the conviction of Wanda Jean Allen?
answer:
murder


question:
Context : The Sleepwalker Killing also known as From the Files of Unsolved Mysteries: 
Question : Which is the basis of The Sleepwalker Killing?
answer:
Unsolved Mysteries


question:
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 : What year was BMD-1 commissioned?
answer:

1969