@article{hierostepgego4dstepgroundingchallengehie,
  title = {HiERO-StepG @ Ego4D Step Grounding Challenge: hierarchical activity understanding enables zero-shot step grounding},
  author = {Andrea Zenotto and Simone Alberto Peirone and Francesca Pistilli and Giuseppe Averta},
  year = {2026},
  eprint = {2605.31227},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.31227},
}