Question: what percent of the american budget is spent on defense
[{'answer': 'about 15 %'}, {'provenance': [{'wikipedia_id': '1629352', 'title': 'Military budget of the United States', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 507, 'bleu_score': 0.670957276555183, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5107550072917781539}, 'section': 'Section::::Abstract.'}]}]