@inproceedings{gebhardt-2020-advances,
    title = "Advances in Using Grammars with Latent Annotations for Discontinuous Parsing",
    author = "Gebhardt, Kilian",
    editor = "Bouma, Gosse  and
      Matsumoto, Yuji  and
      Oepen, Stephan  and
      Sagae, Kenji  and
      Seddah, Djam{\'e}  and
      Sun, Weiwei  and
      S{\o}gaard, Anders  and
      Tsarfaty, Reut  and
      Zeman, Dan",
    booktitle = "Proceedings of the 16th International Conference on Parsing Technologies and the IWPT 2020 Shared Task on Parsing into Enhanced Universal Dependencies",
    month = jul,
    year = "2020",
    address = "Online",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/2020.iwpt-1.9/",
    doi = "10.18653/v1/2020.iwpt-1.9",
    pages = "91--97",
    abstract = "We present new experiments that transfer techniques from Probabilistic Context-free Grammars with Latent Annotations (PCFG-LA) to two grammar formalisms for discontinuous parsing: linear context-free rewriting systems and hybrid grammars. In particular, Dirichlet priors during EM training, ensemble models, and a new nonterminal scheme for hybrid grammars are evaluated. We find that our grammars are more accurate than previous approaches based on discontinuous grammar formalisms and early instances of the discriminative models but inferior to recent discriminative parsers."
}