Question: how many white stars are on the national flag of the usa
[{'answer': 'fifty', 'provenance': [{'wikipedia_id': '11447', 'title': 'Flag of the United States', 'start_paragraph_id': 1, 'start_character': 321, 'end_paragraph_id': 1, 'end_character': 326, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11447', 'title': 'Flag of the United States', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 813, 'bleu_score': 0.9727108480043881, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5923801746141547447}, 'section': 'Section::::Abstract.'}]}]