@inproceedings{
    ogr:prz:21:poleval,
    author = "Ogrodniczuk, Maciej and Przybyła, Piotr",
    pdf = "http://nlp.ipipan.waw.pl/Bib/ogr:prz:21:poleval.pdf",
    title = "Pol{E}val 2021 {T}ask 4: {Q}uestion {A}nswering {C}hallenge",
    pages = "123--136",
    crossref = "ogr:kob:21:poleval"
}
@proceedings{
    ogr:kob:21:poleval,
    editor = "Ogrodniczuk, Maciej and Kobyliński, Łukasz",
    publisher = "Institute of Computer Science, Polish Academy of Sciences",
    isbn = "978-83-63159-31-3",
    title = "Proceedings of the {P}ol{E}val 2021 {W}orkshop",
    booktitle = "Proceedings of the {P}ol{E}val 2021 {W}orkshop",
    address = "Warsaw",
    year = "2021",
    pdf = "http://poleval.pl/files/poleval2021.pdf"
}