Question: how many stars are estimated to be in the milky way galaxy
[{'answer': '100 -- 400 billion stars'}, {'provenance': [{'wikipedia_id': '2589714', 'title': 'Milky Way', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 595, 'bleu_score': 0.7270026951195121, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14449105534884773021}, 'section': 'Section::::Abstract.'}]}]