Question: who escaped in the film the great escape
[{'answer': 'British Commonwealth prisoners of war', 'provenance': [{'wikipedia_id': '181229', 'title': 'The Great Escape (film)', 'start_paragraph_id': 2, 'start_character': 119, 'end_paragraph_id': 2, 'end_character': 156, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]