Question: aerobes use what as the final electron acceptor
[{'answer': 'oxygen', 'provenance': [{'wikipedia_id': '435420', 'title': 'Anaerobic respiration', 'start_paragraph_id': 1, 'start_character': 83, 'end_paragraph_id': 1, 'end_character': 89, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '435420', 'title': 'Anaerobic respiration', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 576, 'bleu_score': 0.944475589384524, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3099563537541237548}, 'section': 'Section::::Abstract.'}]}]