Question: where are hydrogen ions concentrated in cellular respiration
[{'answer': 'inner membrane of the mitochondria', 'provenance': [{'wikipedia_id': '529019', 'title': 'Hydrogen ion', 'start_paragraph_id': 24, 'start_character': 518, 'end_paragraph_id': 24, 'end_character': 552, 'bleu_score': 1.0, 'section': 'Section::::Uses.\n'}]}, {'provenance': [{'wikipedia_id': '529019', 'title': 'Hydrogen ion', 'start_paragraph_id': 24, 'start_character': 0, 'end_paragraph_id': 24, 'end_character': 552, 'bleu_score': 0.977139080690077, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16163854710659343403}, 'section': 'Section::::Uses.\n'}]}]