Question: where are nmda receptors located in the brain
[{'answer': 'in nerve cells', 'provenance': [{'wikipedia_id': '374338', 'title': 'NMDA receptor', 'start_paragraph_id': 1, 'start_character': 134, 'end_paragraph_id': 1, 'end_character': 148, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '374338', 'title': 'NMDA receptor', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 529, 'bleu_score': 0.904208130090084, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9213547469055482244}, 'section': 'Section::::Abstract.'}]}]