Question: when does a body experience a centrifugal force
[{'answer': 'In a rotating reference frame', 'provenance': [{'wikipedia_id': '19265670', 'title': 'Centrifugal force', 'start_paragraph_id': 4, 'start_character': 47, 'end_paragraph_id': 4, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Introduction.\n'}]}, {'provenance': [{'wikipedia_id': '19265670', 'title': 'Centrifugal force', 'start_paragraph_id': 5, 'start_character': 21, 'end_paragraph_id': 5, 'end_character': 559, 'bleu_score': 0.9261582928743001, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8146249741160156159}, 'section': 'Section::::Introduction.\n'}]}]