Question: what are the 4 functions of the lymphatic system
[{'answer': 'transports white blood cells', 'provenance': [{'wikipedia_id': '71425', 'title': 'Lymphatic system', 'start_paragraph_id': 50, 'start_character': 15, 'end_paragraph_id': 50, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::Function.\n'}]}, {'answer': 'transports antigen - presenting cells'}, {'answer': 'the removal of interstitial fluid from tissues'}, {'answer': 'absorbs and transports fatty acids and fats'}]