Question: what are the main organs in the lymphatic system
[{'answer': 'lymphatic organs', 'provenance': [{'wikipedia_id': '71425', 'title': 'Lymphatic system', 'start_paragraph_id': 5, 'start_character': 33, 'end_paragraph_id': 5, 'end_character': 49, 'bleu_score': 1.0, 'section': 'Section::::Structure.\n'}]}, {'provenance': [{'wikipedia_id': '71425', 'title': 'Lymphatic system', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 119, 'bleu_score': 0.8852140475440831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3906731210723289240}, 'section': 'Section::::Structure.\n'}]}]