Question: where are the sensory neurons located in the reflex arc
[{'answer': 'the spinal cord', 'provenance': [{'wikipedia_id': '569418', 'title': 'Reflex arc', 'start_paragraph_id': 1, 'start_character': 146, 'end_paragraph_id': 1, 'end_character': 161, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '569418', 'title': 'Reflex arc', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 455, 'bleu_score': 0.97451705556073, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13789835012971818701}, 'section': 'Section::::Abstract.'}]}]