Question: how many stars in the milky way nasa
[{'answer': '100 -- 400 billion'}, {'provenance': [{'wikipedia_id': '2589714', 'title': 'Milky Way', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 595, 'bleu_score': 0.541817345440841, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10551124959484784984}, 'section': 'Section::::Abstract.'}]}]