Definition: In this task you will be given a passage and a yes/no question based on the passage. You should answer the question using the information from the passage.
Input: passage: The movie is based on the book, Act of Vengeance by Trevor Armbrister, a fact-based story about the corruption that occurred during the United Mine Workers' presidential elections in 1969. It premiered on April 21, 1986. The film also portrayed the murder of Joseph ``Jock'' Yablonski.
 question: is act of vengeance based on a true story?
Output:
Yes