Question: who discovered the four largest moons of jupiter
[{'answer': 'Galileo Galilei', 'provenance': [{'wikipedia_id': '12505', 'title': 'Galilean moons', 'start_paragraph_id': 1, 'start_character': 117, 'end_paragraph_id': 1, 'end_character': 132, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12505', 'title': 'Galilean moons', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 545, 'bleu_score': 0.5750588583173071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4572098677770586115}, 'section': 'Section::::Abstract.'}]}]