Question: who played the title role in the popular film piku
[{'answer': 'Deepika Padukone', 'provenance': [{'wikipedia_id': '42367321', 'title': 'Piku', 'start_paragraph_id': 1, 'start_character': 137, 'end_paragraph_id': 1, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '42367321', 'title': 'Piku', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 524, 'bleu_score': 0.831909845372078, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17986002354897180201}, 'section': 'Section::::Abstract.'}]}]