Question: what term do we use for the lowest layer of the atmosphere
[{'answer': 'troposphere', 'provenance': [{'wikipedia_id': '202899', 'title': 'Atmosphere', 'start_paragraph_id': 25, 'start_character': 147, 'end_paragraph_id': 25, 'end_character': 158, 'bleu_score': 1.0, 'section': 'Section::::Structure.:Earth.\n'}]}, {'provenance': [{'wikipedia_id': '202899', 'title': 'Atmosphere', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 1535, 'bleu_score': 0.982829141928327, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3671913775836017258}, 'section': 'Section::::Structure.:Earth.\n'}]}]