Question: which types of nerve tissue cells carry electrochemical impulses what are the three types
[{'answer': 'A delta fibers'}, {'answer': 'B fibers'}, {'answer': 'C fibres'}, {'provenance': [{'wikipedia_id': '958', 'title': 'Axon', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 860, 'bleu_score': 0.7394999845653181, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2940269410668455303}, 'section': 'Section::::Abstract.'}]}]