Question: what is the deepest part of the ocean basin
[{'answer': 'abyssal plains', 'provenance': [{'wikipedia_id': '1618377', 'title': 'Oceanic basin', 'start_paragraph_id': 6, 'start_character': 321, 'end_paragraph_id': 6, 'end_character': 335, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '1618377', 'title': 'Oceanic basin', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 443, 'bleu_score': 0.9328730072843131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7315994712469347440}, 'section': 'Section::::History.\n'}]}]