arXiv Computation and Language
Sep 11

Characterizing Narrative Content in Web-scale LLM Pretraining Data

The paper presents a detailed examination of narrative elements—agency, setting, and events—within the Dolma web-scale pretraining corpus. Using a framework of 11 interpretable dimensions, the authors hand‑annotated 400 passages, expanded this to a 25,000‑passage LLM‑labeled dataset, and trained NarraBERT models to predict narrative features across 13 million passages, producing the NarraDolma dataset. The study reveals that narrative structure is measurable at scale and that narrative qualities vary unevenly across different data sources, topics, and formats, highlighting gaps in current data curation practices.

By Teagan Johnson, Elliott Ash, Andrew Piper, Maria Antoniak
arXiv Computation and Language
Oct 12

Language Models Have Interpretable Narrative Mechanisms

The paper explores whether language models encode components that represent narrativity. By examining GPT‑2‑Small, Gemma‑2‑2B, and Llama‑3.1‑8B, the authors identify specific attention heads, MLP neurons, and sparse autoencoder features whose activations correlate with narrative properties. Ablating these components raises next‑token prediction loss more for high‑narrativity texts and diminishes narrativity in open‑ended generations, with the strongest effects seen in story completion and narrative question answering tasks.

By David Yiyang Liu, Aditya Joshi, Paul Dawson, Andrew Piper