Question: what is the upper most layer of soil
[{'answer': 'Topsoil', 'provenance': [{'wikipedia_id': '525538', 'title': 'Topsoil', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '525538', 'title': 'Topsoil', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 699, 'bleu_score': 0.501959597240752, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5832051672165534248}, 'section': 'Section::::Abstract.'}]}]