While Chain-of-Thought prompting is popular in reasoning tasks, its
application to Large Language Models (LLMs) in Natural Language Understanding
(NLU) is under-explored. Motivated by multi-step reasoning of LLMs, we propose
Coarse-to-Fine Chain-of-Thought (CoF-CoT) approach that breaks down NLU tasks
into multiple reasoning steps where LLMs can learn to acquire and leverage
essential concepts to solve tasks from different granularities. Moreover, we
propose leveraging semantic-based Abstract Meaning Representation (AMR)
structured knowledge as an intermediate step to capture the nuances and diverse
structures of utterances, and to understand connections between their varying
levels of granularity. Our proposed approach is demonstrated effective in
assisting the LLMs adapt to the multi-grained NLU tasks under both zero-shot
and few-shot multi-domain settings.

我们提出了一种粗细链式思维（CoF-CoT）方法，将自然语言理解任务分解为多个推理步骤，以便大型语言模型学习获取和利用解决不同粒度任务所需的关键概念，并利用基于语义的抽象意义表示（AMR）结构化知识作为中间步骤，捕捉话语的细微差别和多样性结构，并理解它们的不同层次之间的联系。我们的方法在零样本和少样本多领域设置下，证明了对大型语言模型在多粒度自然语言理解任务中的辅助作用。