Question: what is the scientific name for a killer whale
[{'answer': 'Orcinus orca', 'provenance': [{'wikipedia_id': '17011', 'title': 'Killer whale', 'start_paragraph_id': 1, 'start_character': 27, 'end_paragraph_id': 1, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]