@article{fromtagstotreesstructuringfinegrainedkno,
  title = {From Tags to Trees: Structuring Fine-Grained Knowledge for Controllable Data Selection in LLM Instruction Tuning},
  author = {Zihan Niu and Wenping Hu and Junmin Chen and Xiyue Wang and Tong Xu and Ruiming Tang},
  year = {2026},
  eprint = {2601.13995},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2601.13995},
}