Question: who starred in the movie the old man and the sea
[{'answer': 'Spencer Tracy', 'provenance': [{'wikipedia_id': '15912142', 'title': 'The Old Man and the Sea (1958 film)', 'start_paragraph_id': 1, 'start_character': 262, 'end_paragraph_id': 1, 'end_character': 275, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]