Question: when was the last time astronauts landed on the moon
[{'answer': '1972', 'provenance': [{'wikipedia_id': '1558077', 'title': 'Moon landing', 'start_paragraph_id': 2, 'start_character': 155, 'end_paragraph_id': 2, 'end_character': 159, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1558077', 'title': 'Moon landing', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 383, 'bleu_score': 0.8951543634794661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10485066839550847194}, 'section': 'Section::::Crewed landings.\n'}]}]