Question: a layer in the stratosphere where ozone is more concentrated
[{'answer': 'ozone layer', 'provenance': [{'wikipedia_id': '22834', 'title': 'Ozone layer', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '22834', 'title': 'Ozone layer', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 615, 'bleu_score': 0.8728199701947831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10075492989111183650}, 'section': 'Section::::Abstract.'}]}]