Ziqi Liu


2024

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Knowledge-augmented Financial Market Analysis and Report Generation
Yuemin Chen | Feifan Wu | Jingwei Wang | Hao Qian | Ziqi Liu | Zhiqiang Zhang | Jun Zhou | Meng Wang
Proceedings of the 2024 Conference on Empirical Methods in Natural Language Processing: Industry Track

Crafting a convincing financial market analysis report necessitates a wealth of market information and the expertise of financial analysts, posing a highly challenging task. While large language models (LLMs) have enabled the automated generation of financial market analysis text, they still face issues such as hallucinations, errors in financial knowledge, and insufficient capability to reason about complex financial problems, which limits the quality of the generation. To tackle these shortcomings, we propose a novel task and a retrieval-augmented framework grounded in a financial knowledge graph (FKG). The proposed framework is compatible with commonly used instruction-tuning methods. Experiments demonstrate that our framework, coupled with a small-scale language model fine-tuned with instructions, can significantly enhance the logical consistency and quality of the generated analysis texts, outperforming both large-scale language models and other retrieval-augmented baselines.

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Learning to Plan for Retrieval-Augmented Large Language Models from Knowledge Graphs
Junjie Wang | Mingyang Chen | Binbin Hu | Dan Yang | Ziqi Liu | Yue Shen | Peng Wei | Zhiqiang Zhang | Jinjie Gu | Jun Zhou | Jeff Z. Pan | Wen Zhang | Huajun Chen
Findings of the Association for Computational Linguistics: EMNLP 2024

Improving the performance of large language models (LLMs) in complex question-answering (QA) scenarios has always been a research focal point. Recent studies have attempted to enhance LLMs’ performance by combining step-wise planning with external retrieval. While effective for advanced models like GPT-3.5, smaller LLMs face challenges in decomposing complex questions, necessitating supervised fine-tuning. Previous work has relied on manual annotation and knowledge distillation from teacher LLMs, which are time-consuming and not accurate enough. In this paper, we introduce a novel framework for enhancing LLMs’ planning capabilities by using planning data derived from knowledge graphs (KGs). LLMs fine-tuned with this data have improved planning capabilities, better equipping them to handle complex QA tasks that involve retrieval. Evaluations on multiple datasets, including our newly proposed benchmark, highlight the effectiveness of our framework and the benefits of KG-derived planning data.

2022

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A Corpus for Understanding and Generating Moral Stories
Jian Guan | Ziqi Liu | Minlie Huang
Proceedings of the 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies

Teaching morals is one of the most important purposes of storytelling. An essential ability for understanding and writing moral stories is bridging story plots and implied morals. Its challenges mainly lie in: (1) grasping knowledge about abstract concepts in morals, (2) capturing inter-event discourse relations in stories, and (3) aligning value preferences of stories and morals concerning good or bad behavior. In this paper, we propose two understanding tasks and two generation tasks to assess these abilities of machines. We present STORAL, a new dataset of Chinese and English human-written moral stories. We show the difficulty of the proposed tasks by testing various models with automatic and manual evaluation on STORAL. Furthermore, we present a retrieval-augmented algorithm that effectively exploits related concepts or events in training sets as additional guidance to improve performance on these tasks.

2013

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A Random Walk Approach to Selectional Preferences Based on Preference Ranking and Propagation
Zhenhua Tian | Hengheng Xiang | Ziqi Liu | Qinghua Zheng
Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)