Question: who played the joker in the 1966 batman
[{'answer': 'Cesar Romero', 'provenance': [{'wikipedia_id': '4727', 'title': 'Batman (1966 film)', 'start_paragraph_id': 43, 'start_character': 464, 'end_paragraph_id': 43, 'end_character': 476, 'bleu_score': 1.0, 'section': 'Section::::Release.\n'}]}, {'provenance': [{'wikipedia_id': '4727', 'title': 'Batman (1966 film)', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 37, 'bleu_score': 0.6147881529512641, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9248853924036024212}, 'section': 'Section::::Cast.\n'}]}]