@book{
    prze:04ce,
    author = "Przepiórkowski, Adam",
    url = "http://nlp.ipipan.waw.pl/~adamp/Papers/2004-corpus/",
    publisher = "Institute of Computer Science, Polish Academy of Sciences",
    address = "Warsaw",
    title = "The {IPI PAN} Corpus: Preliminary version",
    year = "2004"
}