Question: who starred in the streets of san francisco
[{'answer': 'Karl Malden', 'provenance': [{'wikipedia_id': '340182', 'title': 'The Streets of San Francisco', 'start_paragraph_id': 2, 'start_character': 11, 'end_paragraph_id': 2, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Michael Douglas', 'provenance': [{'wikipedia_id': '340182', 'title': 'The Streets of San Francisco', 'start_paragraph_id': 2, 'start_character': 27, 'end_paragraph_id': 2, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Richard Hatch', 'provenance': [{'wikipedia_id': '340182', 'title': 'The Streets of San Francisco', 'start_paragraph_id': 3, 'start_character': 431, 'end_paragraph_id': 3, 'end_character': 444, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]