LAMUS: Roberts Court Supreme Court Legal Argument Sentences (2005-2025)

362,891 sentences from U.S. Supreme Court opinions during the Roberts Court era (2005-2025), automatically labeled with legal argument categories. The dataset was created by LavanyaPobbathi and last updated on Hugging Face in January 2026.

Use Cases

• Train legal argument classification models based on the automatically labeled categories.
• Analyze trends in legal reasoning and argument types across the Roberts Court era.
• Fine-tune language models for legal text generation or summarization based on Supreme Court opinion sentences.
• Study the evolution of specific legal doctrines through sentence-level argument labels.

Strengths

• Contains 362,891 sentences, providing substantial textual data for analysis.
• Covers a defined 20-year period (2005-2025) of the current Supreme Court era.
• Includes automatic labeling for legal argument categories, adding structured information to the text.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The automatic labeling process may introduce errors that require validation for critical applications.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

U.S. Supreme Court opinions.

Collection Method

Sentences extracted and automatically labeled from opinions.

Time Range

2005-2025

Freshness

Last updated 2026-01-31 08:53:10.

Geography

United States