Question: how many police dogs are there in the uk
[{'answer': 'over 2,500', 'provenance': [{'wikipedia_id': '537859', 'title': 'Police dog', 'start_paragraph_id': 56, 'start_character': 10, 'end_paragraph_id': 56, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Usage by country.:United Kingdom.\n'}]}, {'provenance': [{'wikipedia_id': '537859', 'title': 'Police dog', 'start_paragraph_id': 56, 'start_character': 0, 'end_paragraph_id': 56, 'end_character': 299, 'bleu_score': 0.7658447643424151, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9661083927925051927}, 'section': 'Section::::Usage by country.:United Kingdom.\n'}]}]