@article{johnson-1998-pcfg,
    title = "{PCFG} Models of Linguistic Tree Representations",
    author = "Johnson, Mark",
    editor = "Hirschberg, Julia",
    journal = "Computational Linguistics",
    volume = "24",
    number = "4",
    year = "1998",
    address = "Cambridge, MA",
    publisher = "MIT Press",
    url = "https://preview.aclanthology.org/fix-sig-urls/J98-4004/",
    pages = "613--632"
}