Question: what is the name of the deepest location in the worlds ocean
[{'answer': 'Mariana Trench', 'provenance': [{'wikipedia_id': '19036', 'title': 'Mariana Trench', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19036', 'title': 'Mariana Trench', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 542, 'bleu_score': 0.5658149353193781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6126464517723417239}, 'section': 'Section::::Abstract.'}]}]