Question: when did coventry become part of west midlands
[{'answer': '1974', 'provenance': [{'wikipedia_id': '44766', 'title': 'Coventry', 'start_paragraph_id': 147, 'start_character': 250, 'end_paragraph_id': 147, 'end_character': 254, 'bleu_score': 1.0, 'section': 'Section::::Government and politics.:Local and national government.\n'}]}, {'provenance': [{'wikipedia_id': '44766', 'title': 'Coventry', 'start_paragraph_id': 147, 'start_character': 0, 'end_paragraph_id': 147, 'end_character': 570, 'bleu_score': 0.978375183951072, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9485240835139040966}, 'section': 'Section::::Government and politics.:Local and national government.\n'}]}]