Question: what is a chain of underwater mountains called
[{'answer': 'Seamount chains', 'provenance': [{'wikipedia_id': '167647', 'title': 'Seamount', 'start_paragraph_id': 10, 'start_character': 222, 'end_paragraph_id': 10, 'end_character': 237, 'bleu_score': 1.0, 'section': 'Section::::Geography.:Grouping.\n'}]}, {'provenance': [{'wikipedia_id': '167647', 'title': 'Seamount', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 1148, 'bleu_score': 0.961273104642794, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12985961533341386064}, 'section': 'Section::::Geography.:Grouping.\n'}]}]