Question: where are apache helicopters based in the uk
[{'answer': 'Britain', 'provenance': [{'wikipedia_id': '415620', 'title': 'Army Air Corps (United Kingdom)', 'start_paragraph_id': 1, 'start_character': 440, 'end_paragraph_id': 1, 'end_character': 447, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '415620', 'title': 'Army Air Corps (United Kingdom)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 588, 'bleu_score': 0.8955219004951991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11494465427703176868}, 'section': 'Section::::Abstract.'}]}]