Question: how many light years is the sun from the milky way's center
[{'answer': '26,490 ( ± 100 )', 'provenance': [{'wikipedia_id': '2589714', 'title': 'Milky Way', 'start_paragraph_id': 2, 'start_character': 229, 'end_paragraph_id': 2, 'end_character': 249, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2589714', 'title': 'Milky Way', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 635, 'bleu_score': 0.7972264836530351, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6793593484476709011}, 'section': 'Section::::Abstract.'}]}]