no code implementations • Findings (ACL) 2022 • Kai Sun, Richong Zhang, Samuel Mensah, Yongyi Mao, Xudong Liu
As like previous work, we rely on negative entities to encourage our model to discriminate the golden entities during training.
no code implementations • 18 May 2023 • Samuel Mensah, Kai Sun, Nikolaos Aletras
State-of-the-art target-oriented opinion word extraction (TOWE) models typically use BERT-based text encoders that operate on the word level, along with graph convolutional networks (GCNs) that incorporate syntactic information extracted from syntax trees.
no code implementations • 28 Feb 2023 • Kai Sun, Richong Zhang, Samuel Mensah, Nikolaos Aletras, Yongyi Mao, Xudong Liu
Inspired by the theoretical foundations in domain adaptation [2], we propose a new SSL approach that opts for selecting target samples whose model output from a domain-specific teacher and student network disagree on the unlabelled target data, in an effort to boost the target domain performance.
1 code implementation • 16 Apr 2022 • Mingchen Li, Junfan Chen, Samuel Mensah, Nikolaos Aletras, Xiulong Yang, Yang Ye
Thus, in this paper, we propose a Hierarchical N-Gram framework for Zero-Shot Link Prediction (HNZSLP), which considers the dependencies among character n-grams of the relation surface name for ZSLP.
1 code implementation • EMNLP 2021 • Samuel Mensah, Kai Sun, Nikolaos Aletras
Target-oriented opinion words extraction (TOWE) (Fan et al., 2019b) is a new subtask of target-oriented sentiment analysis that aims to extract opinion words for a given aspect in text.
no code implementations • EMNLP 2020 • Kai Sun, Richong Zhang, Samuel Mensah, Yongyi Mao, Xudong Liu
The idea of using multi-task learning approaches to address the joint extraction of entity and relation is motivated by the relatedness between the entity recognition task and the relation classification task.
Ranked #8 on Relation Extraction on WebNLG
no code implementations • IJCNLP 2019 • Kai Sun, Richong Zhang, Samuel Mensah, Yongyi Mao, Xudong Liu
We propose a method based on neural networks to identify the sentiment polarity of opinion words expressed on a specific aspect of a sentence.