Original: César Estrada Chávez ( March 31 , 1927 -- April 23 , 1993 ) was a Mexican American farm worker , labor leader , and civil rights activist who , with Dolores Huerta , co-founded the National Farm Workers Association , which later became the United Farm Workers ( UFW ) .
Simplified: César Estrada Chávez ( March 31 , 1927 - April 23 , 1993 ) was the leader of a labor union .