Question: how many different kinds of octopuses are there
[{'answer': 'around 300 known species', 'provenance': [{'wikipedia_id': '22780', 'title': 'Octopus', 'start_paragraph_id': 74, 'start_character': 210, 'end_paragraph_id': 74, 'end_character': 234, 'bleu_score': 1.0, 'section': 'Section::::Evolution.\n'}]}, {'provenance': [{'wikipedia_id': '22780', 'title': 'Octopus', 'start_paragraph_id': 74, 'start_character': 4, 'end_paragraph_id': 74, 'end_character': 642, 'bleu_score': 0.7558074710850771, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15819874867058087116}, 'section': 'Section::::Evolution.\n'}]}]