Jinhyuk Lee

Computer Science and Engineering
Princeton University, Korea University
jinhyuk_lee [at] korea [dot] ac [dot] kr


I am a visiting scholar at Princeton University and also a postdoctoral researcher at Korea University. My research areas are based on natural language processing and deep learning. Specifically, I'm interested in learning phrase representations for question answering and building effective biomedical NLP models. I was a PhD student at Korea University advised by Prof. Jaewoo Kang. During my PhD, I did an internship at NAVER Clova where I developed BioBERT and DenSPI.


[Jan 2021] Started working as a visiting scholar at Princeton University (hosted by Danqi Chen).
[Sep 2020] 2 papers (Position Bias, AdvSR) accepted to EMNLP 2020.
[Apr 2020] 2 papers (Sparc, BioSyn) accepted to ACL 2020.
[Mar 2020] Released covidAsk, a COVID-19 QA system (to appear at EMNLP NLP-COVID Workshop 2020).
[Oct 2019] Gave a talk at KJDB 2019 and Tokyo Tech.
[Sep 2019] Our team KU has won the seventh BioASQ challenge in 7b Phase B (Results).
[Aug 2019] 1 paper (BioBERT) accepted to Bioinformatics.
[May 2019] 1 paper (DenSPI) accepted to ACL 2019.

Selected Publications

Learning Dense Representations of Phrases at Scale
Jinhyuk Lee, Mujeen Sung, Jaewoo Kang, Danqi Chen
[Paper] [Code]

Look at the First Sentence: Position Bias in Question Answering
Miyoung Ko, Jinhyuk Lee, Hyunjae Kim, Gangwoo Kim, Jaewoo Kang
EMNLP 2020 (Long)
[Paper] [Code]

Contextualized Sparse Representations for Real-Time Open-Domain Question Answering
Jinhyuk Lee, Minjoon Seo, Hannaneh Hajishirzi, Jaewoo Kang
ACL 2020 (Short)
[Paper] [Slide] [Code] [Demo]

Biomedical Entity Representations with Synonym Marginalization
Mujeen Sung, Hwisang Jeon, Jinhyuk Lee, Jaewoo Kang
ACL 2020 (Long)
[Paper] [Code]

Real-Time Open-Domain Question Answering on Wikipedia with Dense-Sparse Phrase Index
Minjoon Seo*, Jinhyuk Lee*, Tom Kwiatkowski, Ankur Parikh, Ali Farhadi, Hannaneh Hajishirzi
ACL 2019 (Long)
[Paper] [Code] [Demo]

BioBERT: a Pre-trained Biomedical Language Representation Model for Biomedical Text Mining
Jinhyuk Lee*, Wonjin Yoon*, Sungdong Kim, Donghyeon Kim, Sunkyu Kim, Chan Ho So, Jaewoo Kang
Bioinformatics (2019)
Applied to BERN (BioNER + Normalization), BioASQ models, etc
[Paper] [Code]

Ranking Paragraphs for Improving Answer Recall in Open-Domain Question Answering
Jinhyuk Lee, Seongjun Yun, Hyunjae Kim, Miyoung Ko, Jaewoo Kang
EMNLP 2018 (Short)
[Paper] [Code]

Name Nationality Classification with Recurrent Neural Networks
Jinhyuk Lee, Hyunjae Kim, Miyoung Ko, Donghee Choi, Jaehoon Choi, Jaewoo Kang
IJCAI 2017
[Paper] [Code]

Workshop Papers

Answering Questions on COVID-19 in Real-Time
Jinhyuk Lee, Sean S. Yi, Minbyul Jeong, Mujeen Sung, Wonjin Yoon, Yonghwa Choi, Miyoung Ko, Jaewoo Kang
NLP-COVID Workshop at EMNLP 2020
[Paper] [Code] [Web Service]

Pre-trained Language Models for Biomedical Question Answering
Wonjin Yoon, Jinhyuk Lee, Donghyeon Kim, Minbyul Jeong, Jaewoo Kang
BioASQ Workshop at ECML PKDD 2019
1st Place at the Seventh BioASQ Challenge (Task 7B) - Results
[Paper] [Code]

CollaboNet: Collaboration of Deep Neural Networks for Biomedical Named Entity Recognition
Wonjin Yoon*, Chan Ho So*, Jinhyuk Lee, Jaewoo Kang
DTMBIO Workshop at CIKM 2018 (Published in BMC Bioinformatics)
[Paper] [Code]