Question: of the four galilean moons which is the closest to jupiter
[{'answer': 'Io', 'provenance': [{'wikipedia_id': '12505', 'title': 'Galilean moons', 'start_paragraph_id': 1, 'start_character': 57, 'end_paragraph_id': 1, 'end_character': 59, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12505', 'title': 'Galilean moons', 'start_paragraph_id': 31, 'start_character': 0, 'end_paragraph_id': 31, 'end_character': 356, 'bleu_score': 0.968982777549629, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4315114273812689206}, 'section': 'Section::::Members.:Io.\n'}]}]