Question: hydrosphere is a part of the earth's surface covered by
[{'answer': 'water', 'provenance': [{'wikipedia_id': '145753', 'title': 'Hydrosphere', 'start_paragraph_id': 1, 'start_character': 43, 'end_paragraph_id': 1, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '145753', 'title': 'Hydrosphere', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 197, 'bleu_score': 0.9383861709333501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9282800008516821470}, 'section': 'Section::::Abstract.'}]}]