Conversation so far:
What was Victor Jara's role in political activism?
Victor Jara supported  Salvador Allende, the Popular Unity coalition candidate for president.
What role did Victor Jara play in political activism?
In 1970, Victor Jara supported Allende, the Popular Unity coalition candidate for president, volunteering for political work and playing free concerts.
Why did Victor Jara support Salvador Allende?
Victor Jara supported Salvador Allende because of his socialist politics

Question: When did his activism end?
Self-contained rewrite: When did Victor Jara's activism end?