Question: What engine designed to power medium duty trucks and heavy cars was also used in Chevy's intermediate and pony car?
{'answer': 'The Chevrolet "Big Block"', 'supporting_facts': [['Chevrolet L72', 0], ['Chevrolet L72', 3], ['Chevrolet Big-Block engine', 0], ['Chevrolet Big-Block engine', 2]]}