Question: where does the greenhouse effect occur in the atmosphere
[{'answer': 'the mid-troposphere', 'provenance': [{'wikipedia_id': '12395', 'title': 'Greenhouse effect', 'start_paragraph_id': 13, 'start_character': 560, 'end_paragraph_id': 13, 'end_character': 579, 'bleu_score': 1.0, 'section': 'Section::::Mechanism.\n'}]}, {'provenance': [{'wikipedia_id': '12395', 'title': 'Greenhouse effect', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 1012, 'bleu_score': 0.891361952502819, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 78583425335028447}, 'section': 'Section::::Mechanism.\n'}]}]