Question: how many types of holly bushes are there
[{'answer': '400 to 600 species'}, {'provenance': [{'wikipedia_id': '19119938', 'title': 'Holly', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 248, 'bleu_score': 0.8084501886763631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8698078799824897916}, 'section': 'Section::::Abstract.'}]}]