Question: cholesterol is an example of what type of lipid
[{'answer': 'sterol - containing metabolites', 'provenance': [{'wikipedia_id': '17940', 'title': 'Lipid', 'start_paragraph_id': 4, 'start_character': 268, 'end_paragraph_id': 4, 'end_character': 302, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '17940', 'title': 'Lipid', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 511, 'bleu_score': 0.9751504244977051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17341373771287165799}, 'section': 'Section::::Abstract.'}]}]