Question: who starred in barefoot in the park on broadway
[{'answer': 'Robert Redford', 'provenance': [{'wikipedia_id': '607156', 'title': 'Barefoot in the Park', 'start_paragraph_id': 1, 'start_character': 106, 'end_paragraph_id': 1, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Elizabeth Ashley', 'provenance': [{'wikipedia_id': '607156', 'title': 'Barefoot in the Park', 'start_paragraph_id': 1, 'start_character': 125, 'end_paragraph_id': 1, 'end_character': 141, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '607156', 'title': 'Barefoot in the Park', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 212, 'bleu_score': 0.692493194480926, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5993422768361850766}, 'section': 'Section::::Abstract.'}]}]