NTU_NLP at SemEval-2020 Task 12: Identifying Offensive Tweets Using Hierarchical Multi-Task Learning Approach
Po-Chun Chen, Hen‐Hsen Huang, Hsin‐Hsi Chen · 2020
This paper presents our hierarchical multi-task learning (HMTL) and multi-task learning (MTL) approaches for improving the text encoder in Sub-tasks A, B, and C of Multilingual Offensive Language Identification in Social Media (SemEval-2020 Task 12).We show that using the MTL approach can greatly improve the performance of complex problems, i.e.Sub-tasks B and C. Coupled with a hierarchical approach, the performances are further improved.Overall, our best model, HMTL outperforms the baseline model by 3% and 2% of Macro F-score in Sub-tasks B and C of OffensEval 2020, respectively.