Question: where are the three types of neurons located
[{'answer': 'spinal cord', 'provenance': [{'wikipedia_id': '152964', 'title': 'Motor neuron', 'start_paragraph_id': 1, 'start_character': 108, 'end_paragraph_id': 1, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '152964', 'title': 'Motor neuron', 'start_paragraph_id': 1, 'start_character': 186, 'end_paragraph_id': 1, 'end_character': 711, 'bleu_score': 0.517015257016178, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13075756102361663903}, 'section': 'Section::::Abstract.'}]}]