Question: who played the leading man role in m. butterfly's 1988 broadway production
[{'answer': 'John Lithgow', 'provenance': [{'wikipedia_id': '33742897', 'title': 'M. Butterfly', 'start_paragraph_id': 4, 'start_character': 205, 'end_paragraph_id': 4, 'end_character': 217, 'bleu_score': 1.0, 'section': 'Section::::Productions.\n'}]}, {'provenance': [{'wikipedia_id': '33742897', 'title': 'M. Butterfly', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 380, 'bleu_score': 0.625793423935176, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17783036212905768730}, 'section': 'Section::::Productions.\n'}]}]