I want to know the answer to the following question:
What was the name of the bodybuilding film Schwarzenegger starred in?
All the background I'm provided with is that "Months before the 1975 Mr. Olympia contest, filmmakers George Butler and Robert Fiore persuaded Schwarzenegger to compete, in order to film his training in the bodybuilding documentary called Pumping Iron.". Is that enough to answer the question?