Question: who was the astronaut who stepped on the moon with his left foot in 1969
[{'answer': 'Armstrong', 'provenance': [{'wikipedia_id': '662', 'title': 'Apollo 11', 'start_paragraph_id': 1, 'start_character': 83, 'end_paragraph_id': 1, 'end_character': 92, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '662', 'title': 'Apollo 11', 'start_paragraph_id': 81, 'start_character': 0, 'end_paragraph_id': 81, 'end_character': 860, 'bleu_score': 0.5331693710817771, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14961270894654480087}, 'section': 'Section::::Mission.:Lunar surface operations.\n'}]}]