Question: what are the four major types of plasma lipoproteins
[{'answer': 'Chylomicrons', 'provenance': [{'wikipedia_id': '92512', 'title': 'Lipoprotein', 'start_paragraph_id': 1, 'start_character': 792, 'end_paragraph_id': 1, 'end_character': 804, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'High - density lipoproteins ( HDL )'}, {'answer': 'Low - density lipoproteins ( LDL )'}, {'answer': 'Very - low - density lipoproteins ( VLDL )'}]