Question: who play the character of anarkali in mughal e azam
[{'answer': 'Madhubala', 'provenance': [{'wikipedia_id': '518117', 'title': 'Mughal-e-Azam', 'start_paragraph_id': 1, 'start_character': 158, 'end_paragraph_id': 1, 'end_character': 167, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '518117', 'title': 'Mughal-e-Azam', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 754, 'bleu_score': 0.983672097934538, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15426083570714179682}, 'section': 'Section::::Plot.\n'}]}]