Question: what is the horsepower for a 9n ford tractor
[{'answer': '13 drawbar horsepower', 'provenance': [{'wikipedia_id': '3421415', 'title': 'Ford N-series tractor', 'start_paragraph_id': 6, 'start_character': 766, 'end_paragraph_id': 6, 'end_character': 787, 'bleu_score': 1.0, 'section': 'Section::::Development of the Ford-Ferguson tractors.\n'}]}, {'provenance': [{'wikipedia_id': '3421415', 'title': 'Ford N-series tractor', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 992, 'bleu_score': 0.9879148529393721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1564055624352006328}, 'section': 'Section::::Development of the Ford-Ferguson tractors.\n'}]}]