Question: how many types of salmon fish are there
[{'answer': 'eight species', 'provenance': [{'wikipedia_id': '36984', 'title': 'Salmon', 'start_paragraph_id': 4, 'start_character': 346, 'end_paragraph_id': 4, 'end_character': 359, 'bleu_score': 1.0, 'section': 'Section::::Species.\n'}]}, {'provenance': [{'wikipedia_id': '36984', 'title': 'Salmon', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 611, 'bleu_score': 0.9792717993254391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4814689593549902483}, 'section': 'Section::::Species.\n'}]}]