Question: how many types of poison dart frogs are there
[{'answer': 'about 170 species', 'provenance': [{'wikipedia_id': '812186', 'title': 'Poison dart frog', 'start_paragraph_id': 14, 'start_character': 186, 'end_paragraph_id': 14, 'end_character': 203, 'bleu_score': 1.0, 'section': 'Section::::Taxonomy.\n'}]}, {'provenance': [{'wikipedia_id': '812186', 'title': 'Poison dart frog', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 203, 'bleu_score': 0.934334813046729, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12256859837961437087}, 'section': 'Section::::Taxonomy.\n'}]}]