Question: where are the stomata usually found on a leaf
[{'answer': 'the epidermis', 'provenance': [{'wikipedia_id': '85746', 'title': 'Stoma', 'start_paragraph_id': 1, 'start_character': 130, 'end_paragraph_id': 1, 'end_character': 143, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '85746', 'title': 'Stoma', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 363, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 898406792296726071}, 'section': 'Section::::Abstract.'}]}]