Question: where was it first discovered that the earths ozone layer was being depleted
[{'answer': 'Joe Farman', 'provenance': [{'wikipedia_id': '22834', 'title': 'Ozone layer', 'start_paragraph_id': 19, 'start_character': 568, 'end_paragraph_id': 19, 'end_character': 578, 'bleu_score': 1.0, 'section': 'Section::::Depletion.\n'}]}, {'answer': 'Brian Gardiner', 'provenance': [{'wikipedia_id': '22834', 'title': 'Ozone layer', 'start_paragraph_id': 19, 'start_character': 580, 'end_paragraph_id': 19, 'end_character': 594, 'bleu_score': 1.0, 'section': 'Section::::Depletion.\n'}]}, {'answer': 'Jonathan Shanklin', 'provenance': [{'wikipedia_id': '22834', 'title': 'Ozone layer', 'start_paragraph_id': 19, 'start_character': 599, 'end_paragraph_id': 19, 'end_character': 616, 'bleu_score': 1.0, 'section': 'Section::::Depletion.\n'}]}, {'provenance': [{'wikipedia_id': '22834', 'title': 'Ozone layer', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 671, 'bleu_score': 0.9817332376369081, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14114699933389537160}, 'section': 'Section::::Depletion.\n'}]}]