Question: This japanese actor lent his voice to the fourth and fifth installments of the "Transformers" franchise and was in a  2006 Japanese-American war film directed and co-produced by who?
{'answer': 'Clint Eastwood', 'supporting_facts': [['Ken Watanabe', 0], ['Ken Watanabe', 1], ['Ken Watanabe', 5], ['Letters from Iwo Jima', 0]]}