We introduce the Cambridge Law Corpus (CLC), a corpus for legal AI research. It consists of over 250 000 court cases from the UK. Most cases are from the 21st century, but the corpus includes cases as old as the 16th century. This paper presents the first release of the corpus, containing the raw text and meta-data. Together with the corpus, we provide annotations on case outcomes for 638 cases, done by legal experts. Using our annotated data, we have trained and evaluated case outcome extraction with GPT-3, GPT-4 and RoBERTa models to provide benchmarks. We include an extensive legal and ethical discussion to address the potentially sensitive nature of this material. As a consequence, the corpus will only be released for research purposes under certain restrictions.

翻译：我们推出剑桥法律语料库（Cambridge Law Corpus, CLC），这是一个面向法律人工智能研究的语料库。该语料库包含超过25万份英国法院判例，其中大部分为21世纪的案例，但最早可追溯至16世纪。本文呈现该语料库的首个版本，包含原始文本和元数据。同时，我们提供了由法律专家完成的638个案例的判决结果标注。基于标注数据，我们使用GPT-3、GPT-4和RoBERTa模型开展了案例结果抽取训练与评估，以建立基准性能指标。文中还包含详尽的法学与伦理讨论，以应对该材料潜在的敏感性。因此，该语料库将仅在特定限制条件下用于研究目的。