Before revision:  Our experimental results indicate that our model outperforms state-of-the-art approaches baselines in terms of F1-score by + 11\% .
After revision:  Our experimental results indicate that our model outperforms state-of-the-art approaches baselines in terms of F1-score by + 6\% and +4\% on the TREC-IS dataset and COVID-19 Tweets, respectively .