Question: what is the full form of cfc's
[{'answer': 'Chlorofluorocarbons', 'provenance': [{'wikipedia_id': '54910', 'title': 'Chlorofluorocarbon', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '54910', 'title': 'Chlorofluorocarbon', 'start_paragraph_id': 1, 'start_character': 20, 'end_paragraph_id': 1, 'end_character': 737, 'bleu_score': 0.80353581235295, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12200440304510839460}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '54910', 'title': 'Chlorofluorocarbon', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12200440304510839460}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41513000', 'title': 'Canadian Society of Clinical Chemists', 'section': 'Section::::Activities.\n', 'start_paragraph_id': 6, 'end_paragraph_id': 6, 'meta': {'evidence_span': ['The 61st annual CSCC conference was held in San Diego, CA, USA July 31-August 4, 2017 as a joint meeting with the AACC.', 'Point-Of-Care Testing, Pediatric and Perinatal Biochemistry,']}}]}, {'provenance': [{'wikipedia_id': '54910', 'title': 'Chlorofluorocarbon', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Chlorofluorocarbons (CFCs)', 'Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated paraffin hydrocarbons that contain only carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F),']}}]}]