Question: who voices the transformers in age of extinction
[{'answer': 'Peter Cullen as Optimus Prime', 'provenance': [{'wikipedia_id': '32338015', 'title': 'Transformers: Age of Extinction', 'start_paragraph_id': 66, 'start_character': 149, 'end_paragraph_id': 66, 'end_character': 178, 'bleu_score': 1.0, 'section': 'Section::::Release.:Marketing.\n'}]}, {'answer': 'John Goodman as Hound', 'provenance': [{'wikipedia_id': '32338015', 'title': 'Transformers: Age of Extinction', 'start_paragraph_id': 28, 'start_character': 12, 'end_paragraph_id': 28, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Voices.\n'}]}, {'answer': 'Ken Watanabe as Drift', 'provenance': [{'wikipedia_id': '32338015', 'title': 'Transformers: Age of Extinction', 'start_paragraph_id': 29, 'start_character': 12, 'end_paragraph_id': 29, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Voices.\n'}]}, {'answer': 'Robert Foxworth as Ratchet', 'provenance': [{'wikipedia_id': '32338015', 'title': 'Transformers: Age of Extinction', 'start_paragraph_id': 30, 'start_character': 12, 'end_paragraph_id': 30, 'end_character': 38, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Voices.\n'}]}, {'answer': 'John DiMaggio as Crosshairs', 'provenance': [{'wikipedia_id': '32338015', 'title': 'Transformers: Age of Extinction', 'start_paragraph_id': 31, 'start_character': 12, 'end_paragraph_id': 31, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Voices.\n'}]}, {'answer': 'Mark Ryan as Lockdown', 'provenance': [{'wikipedia_id': '32338015', 'title': 'Transformers: Age of Extinction', 'start_paragraph_id': 32, 'start_character': 12, 'end_paragraph_id': 32, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Voices.\n'}]}, {'answer': 'Reno Wilson as Brains', 'provenance': [{'wikipedia_id': '32338015', 'title': 'Transformers: Age of Extinction', 'start_paragraph_id': 33, 'start_character': 12, 'end_paragraph_id': 33, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Voices.\n'}]}, {'answer': 'Frank Welker as Galvatron / Megatron'}]