Question: who has went the deepest in the ocean
[{'answer': 'James Cameron', 'provenance': [{'wikipedia_id': '7786', 'title': 'Challenger Deep', 'start_paragraph_id': 5, 'start_character': 318, 'end_paragraph_id': 5, 'end_character': 331, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]