Question: how many floors are there in the gherkin
[{'answer': '41 stories'}, {'provenance': [{'wikipedia_id': '185633', 'title': '30 St Mary Axe', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 508, 'bleu_score': 0.673888615384976, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6927784217782533473}, 'section': 'Section::::Abstract.'}]}]