A CRF-Based Stacking Model with Meta-features for Named Entity Recognition. - Shifeng Liu 002; Yifang Sun; Wei Wang 011; Xiaoling Zhou (PAKDD (2), 2018)

Extracting Definitions and Hypernyms with a Two-Phase Framework. - Yifang Sun; Shifeng Liu 002; Yufei Wang 003; Wei Wang 011 (DASFAA (3), 2019)

Recursively Binary Modification Model for Nested Named Entity Recognition. - Bing Li 002; Shifeng Liu 002; Yifang Sun; Wei Wang 011; Xiang Zhao 002 (AAAI, 2020)

HAMNER: Headword Amplified Multi-Span Distantly Supervised Method for Domain Specific Named Entity Recognition. - Shifeng Liu 002; Yifang Sun; Bing Li 002; Wei Wang 011; Xiang Zhao 002 (AAAI, 2020)

Machine Learning-based Sequence Labeling for Text Data. - Shifeng Liu 002 (2020)

Sent2Span: Span Detection for PICO Extraction in the Biomedical Text without Span Annotations. - Shifeng Liu 002; Yifang Sun; Bing Li 002; Wei Wang 011; Florence T. Bourgeois; Adam G. Dunn (EMNLP (Findings), 2021)