Question: who played professor higgins in my fair lady
[{'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.'}]}]