Hi there! I am Shicheng (George) Liu, third-year CS Ph.D. at Stanford. I am currently advised by Prof. Monica S. Lam at Stanford Open Virtual Assistant Lab (OVAL). I focus on real-life, practical NLP problems, often drawing perspectives from computer systems and programming languages. My recent research focuses on knowledge agents with LLMs, aiming to enable domain-independent approaches that effectively retrieve and navigate different sources of knowledge, including structured, unstructured, and hybrid (combination of structured and unstructured data) sources.

Education

• Ph.D in Computer Science
  Stanford University, 2022 - 2027 (Expected)

• B.S. (w. Honors) in Computer Science & in Mathematics, Minor in Physics
  The University of Chicago, 2022

  • Quarter-long exchange (Autumn 2021), California Institute of Technology

Selected Recent Publications

• LLMs with Structured and Unstructured data
  • SUQL: Conversational Search over Structured and Unstructured Data with Large Language Models
    (10-min video presentation)
    Shicheng Liu, Jialiang Xu, Wesley Tjangnaka, Sina J. Semnani, Chen Jie Yu, Monica S. Lam
    Findings of the North American Chapter of Association for Computational Linguistics (NAACL 2024)
    
• LLMs with Knowledge Graph

  • SPINACH: SPARQL-Based Information Navigation for Challenging Real-World Questions
    (10-min video presentation)
    Shicheng Liu^*, Sina J. Semnani^*, Harold Triedman, Jialiang Xu, Isaac Dan Zhao, Monica S. Lam
    Findings of the 2024 Conference on Empirical Methods in Natural Language Processing (EMNLP 2024)
    

  • Fine-tuned LLMs Know More, Hallucinate Less with Few-Shot Sequence-to-Sequence Semantic Parsing over Wikidata
    (6-min video presentation)
    Silei Xu^*, Shicheng Liu^*, Theo Culhane, Elizaveta Pertseva, Meng-Hsi Wu, Sina Semnani, Monica S. Lam
    The 2023 Conference on Empirical Methods in Natural Language Processing (EMNLP 2023)
    

• Programmable Task and Knowledge Agents with LLMs
  • Coding Reliable LLM-based Integrated Task and Knowledge Agents with GenieWorksheets
    Harshit Joshi, Shicheng Liu, James Chen, Robert Weigle, Monica S. Lam
    Pre-print, 2024/07, in submission