Question: goose bumps are caused by action of the
[{'answer': 'pilomotor reflex', 'provenance': [{'wikipedia_id': '793825', 'title': 'Goose bumps', 'start_paragraph_id': 2, 'start_character': 377, 'end_paragraph_id': 2, 'end_character': 393, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '793825', 'title': 'Goose bumps', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 558, 'bleu_score': 0.9450701851959151, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9870668382636128092}, 'section': 'Section::::Abstract.'}]}]