Question: when was the movie west side story made
[{'answer': '1961', 'provenance': [{'wikipedia_id': '16623133', 'title': 'West Side Story (disambiguation)', 'start_paragraph_id': 5, 'start_character': 31, 'end_paragraph_id': 5, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Uses related to the musical.\n'}]}]