Question: when did the mars rover land on mars
[{'answer': 'August 6 , 2012', 'provenance': [{'wikipedia_id': '36645032', 'title': 'Curiosity (rover)', 'start_paragraph_id': 73, 'start_character': 113, 'end_paragraph_id': 73, 'end_character': 131, 'bleu_score': 1.0, 'section': 'Section::::Coverage, cultural impact and legacy.\n'}]}, {'provenance': [{'wikipedia_id': '36645032', 'title': 'Curiosity (rover)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 720, 'bleu_score': 0.728293725950224, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 106707580095443196}, 'section': 'Section::::Abstract.'}]}]