Question: ozone layer depletion in antartica is due to which compound
[{'answer': 'organohalogens', 'provenance': [{'wikipedia_id': '44183', 'title': 'Ozone depletion', 'start_paragraph_id': 74, 'start_character': 291, 'end_paragraph_id': 74, 'end_character': 305, 'bleu_score': 1.0, 'section': 'Section::::Public policy.\n'}]}, {'provenance': [{'wikipedia_id': '44183', 'title': 'Ozone depletion', 'start_paragraph_id': 74, 'start_character': 0, 'end_paragraph_id': 74, 'end_character': 1342, 'bleu_score': 0.941564133838635, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4213842082204881447}, 'section': 'Section::::Public policy.\n'}]}]