Question: who played the role of anant velankar in the movie ardh satya
[{'answer': 'Om Puri', 'provenance': [{'wikipedia_id': '8817989', 'title': 'Ardh Satya', 'start_paragraph_id': 2, 'start_character': 56, 'end_paragraph_id': 2, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8817989', 'title': 'Ardh Satya', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 323, 'bleu_score': 0.915132941383415, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7399500270880071941}, 'section': 'Section::::Plot.\n'}]}]