Question: which protein is responsible for the breakdown of a fibrin clot
[{'answer': 'plasmin', 'provenance': [{'wikipedia_id': '241010', 'title': 'Fibrinolysis', 'start_paragraph_id': 2, 'start_character': 92, 'end_paragraph_id': 2, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '241010', 'title': 'Fibrinolysis', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 253, 'bleu_score': 0.9529077664391161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12074709133741704774}, 'section': 'Section::::Abstract.'}]}]