TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: Context : Used by the U.S. Army, the U.S. Marine Corps, as well as many foreign militaries, the M47 Dragon was first fielded in January 1975 to U.S. Army soldiers stationed in mainland Europe.
Question : What year did M47 Dragon come into use?

SOLUTION: 1975

PROBLEM: Context : Khadijeh Saqafi (aka Ghods Iran Saqafi) (1913 -- 21 March 2009) was the wife of Ayatollah Ruhollah Khomeini, the leader of the 1979 Iranian Revolution.
Question : What is Khadijeh Saqafi's spouse's name?

SOLUTION: Ruhollah Khomeini

PROBLEM: Context : Statesmen of World War I is an oil on canvas painting by Sir James Guthrie, completed in 1930, shortly before Guthrie's death.
Question : What material was used for Statesmen of World War I?

SOLUTION:
canvas