@article{sun-etal-2026-data,
    title = "Data Foundations of Long-Context Language Models: A Survey",
    author = "Sun, Zechen  and
      Sun, Yuyang  and
      Su, Zhaochen  and
      Tang, Zecheng  and
      Li, Juntao  and
      Zhou, Ao  and
      Chen, Wenliang  and
      Zhang, Min",
    journal = "Transactions of the Association for Computational Linguistics",
    volume = "14",
    year = "2026",
    address = "Cambridge, MA",
    publisher = "MIT Press",
    url = "https://aclanthology.org/2026.tacl-1.81/",
    doi = "10.1162/tacl.a.775",
    pages = "1803--1825"
}