Question: how many canadian prime ministers served in the military
[{'answer': 'seven', 'provenance': [{'wikipedia_id': '1985686', 'title': 'List of Prime Ministers of Canada by military service', 'start_paragraph_id': 3, 'start_character': 5, 'end_paragraph_id': 3, 'end_character': 10, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1985686', 'title': 'List of Prime Ministers of Canada by military service', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 54, 'bleu_score': 0.7860753021519781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5547832076136508278}, 'section': 'Section::::Abstract.'}]}]