Question: titan is the natural satellite of which planet
[{'answer': 'Saturn', 'provenance': [{'wikipedia_id': '47402', 'title': 'Titan (moon)', 'start_paragraph_id': 1, 'start_character': 29, 'end_paragraph_id': 1, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '47402', 'title': 'Titan (moon)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 687, 'bleu_score': 0.914300020453584, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12862629266941914302}, 'section': 'Section::::Abstract.'}]}]