Question: which layer of the epidermis is not found in all types of human skin
[{'answer': 'stratum lucidum', 'provenance': [{'wikipedia_id': '333119', 'title': 'Epidermis', 'start_paragraph_id': 15, 'start_character': 38, 'end_paragraph_id': 15, 'end_character': 53, 'bleu_score': 1.0, 'section': 'Section::::Structure.:Layers.\n'}]}, {'provenance': [{'wikipedia_id': '333119', 'title': 'Epidermis', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 79, 'bleu_score': 0.676778111654288, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1506879094893852750}, 'section': 'Section::::Structure.:Layers.\n'}]}]