instruction:
Generate a correct and concise answer for the question based on the words in the context.
question:
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?
answer:
1975


question:
Context : Olaf Wildeboer Faber (born March 4, 1983 in Sabadell, Catalonia, Spain) is a freestyle swimmer. 
Question : What city is Olaf Wildeboer from?
answer:
Sabadell


question:
Context : George W. Chang is a professor and a resident faculty member at the University of California, Berkeley. 
Question : The college George W. Chang attended was what?
answer:

University of California, Berkeley