Question: who starred in the original my fair lady
[{'answer': 'Audrey Hepburn', 'provenance': [{'wikipedia_id': '19027', 'title': 'My Fair Lady', 'start_paragraph_id': 84, 'start_character': 397, 'end_paragraph_id': 84, 'end_character': 411, 'bleu_score': 1.0, 'section': 'Section::::Productions.:Other major productions.:2007 New York Philharmonic concert and US tour.\n'}]}, {'answer': 'Rex Harrison', 'provenance': [{'wikipedia_id': '19027', 'title': 'My Fair Lady', 'start_paragraph_id': 1, 'start_character': 347, 'end_paragraph_id': 1, 'end_character': 359, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19027', 'title': 'My Fair Lady', 'start_paragraph_id': 122, 'start_character': 0, 'end_paragraph_id': 122, 'end_character': 1269, 'bleu_score': 0.9502742468249321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13033846600418224114}, 'section': 'Section::::Adaptations.:1964 film.\n'}]}]