Question: which glands secrete the oily substance that lubricates the skin
[{'answer': 'Sebaceous glands', 'provenance': [{'wikipedia_id': '464075', 'title': 'Sebaceous gland', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '464075', 'title': 'Sebaceous gland', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 618, 'bleu_score': 0.808088665971978, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4476317603532481368}, 'section': 'Section::::Abstract.'}]}]