Question: astronaut who has spent the most time in space
[{'answer': 'Gennady Padalka', 'provenance': [{'wikipedia_id': '899424', 'title': 'List of spaceflight records', 'start_paragraph_id': 16, 'start_character': 18, 'end_paragraph_id': 16, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Duration records.:Most time in space.\n'}]}, {'provenance': [{'wikipedia_id': '899424', 'title': 'List of spaceflight records', 'start_paragraph_id': 16, 'start_character': 18, 'end_paragraph_id': 16, 'end_character': 494, 'bleu_score': 0.683251651397178, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4343201446471284588}, 'section': 'Section::::Duration records.:Most time in space.\n'}]}]