We compare our best F1 score with other state-of-the-art approaches in table TABREF39 , which shows our model has competitive advantage in dealing with drug-drug interaction extraction. 
 Question: By how much does their model outperform existing methods?
Answer with content missing: (Table II) Proposed model has F1 score of  0.7220 compared to 0.7148 best state-state-of-the-art result.