The NewSHead dataset contains 369,940 English stories with 932,571 unique URLs, among which there are 359,940 stories for training, 5,000 for validation, and 5,000 for testing, respectively. Each news story contains at least three (and up to five) articles.

The dataset is collected from news stories published between May 2018 and May 2019, where a proprietary clustering algorithm iteratively loads articles published in a time window and groups them based on content similarity. Up to five representative articles are picked from the cluster for generating the story headline. Curators from a crowd-sourcing platform are requested to provide a headline of up to 35 characters to describe the major information covered by the story.