Question: the hydrosphere composes approximately what percent of the earths surface
[{'answer': '70.9', 'provenance': [{'wikipedia_id': '18842359', 'title': 'Ocean', 'start_paragraph_id': 16, 'start_character': 345, 'end_paragraph_id': 16, 'end_character': 349, 'bleu_score': 1.0, 'section': "Section::::Earth's global ocean.:Physical properties.\n"}]}, {'provenance': [{'wikipedia_id': '18842359', 'title': 'Ocean', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 833, 'bleu_score': 0.757395785238241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17926529596972158545}, 'section': "Section::::Earth's global ocean.:Physical properties.\n"}]}]