@article{PunyakanokRoYi04a,
    author = {V. Punyakanok and D. Roth and W. Yih},
    title = {Mapping Dependencies Trees: An Application to Question Answering},
    booktitle = {AI & Math Workshop},
    month = {1},
    year = {2004},
    url = "http://cogcomp.org/papers/PunyakanokRoYi04a.pdf",
}