Question: what is the deepest part of the atlantic ocean
[{'answer': 'Milwaukee Deep'}, {'provenance': [{'wikipedia_id': '1354339', 'title': 'Puerto Rico Trench', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 374, 'bleu_score': 0.550332611595801, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3074960909394478682}, 'section': 'Section::::Abstract.'}]}]