Question: who stepped on the moon after neil armstrong
[{'answer': 'Buzz Aldrin', 'provenance': [{'wikipedia_id': '129540', 'title': 'List of Apollo astronauts', 'start_paragraph_id': 28, 'start_character': 22, 'end_paragraph_id': 28, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::Prime crew members.:From Astronaut Group 3.\n'}]}]