Question: how many species of snake are there in the uk
[{'answer': 'four'}, {'provenance': [{'wikipedia_id': '2123107', 'title': 'List of reptiles of Great Britain', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 258, 'bleu_score': 0.8928756684056031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2453294928141066611}, 'section': 'Section::::Abstract.'}]}]