Question: where does active transport occur in the membrane
[{'answer': 'natemembrane'}, {'provenance': [{'wikipedia_id': '144602', 'title': 'Active transport', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 211, 'bleu_score': 0.626037503835834, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13286154324727730491}, 'section': 'Section::::Cellular transportation mechanisms.\n'}]}]