Question: how many nhs trusts are there in england
[{'answer': '470', 'provenance': [{'wikipedia_id': '783106', 'title': 'NHS trust', 'start_paragraph_id': 4, 'start_character': 265, 'end_paragraph_id': 4, 'end_character': 268, 'bleu_score': 1.0, 'section': 'Section::::Nature of a trust.\n'}]}, {'provenance': [{'wikipedia_id': '783106', 'title': 'NHS trust', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 576, 'bleu_score': 0.8483220312810731, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6871545880580442565}, 'section': 'Section::::Nature of a trust.\n'}]}]