@book{okuno16gengoshori,
    title = {自然言語処理の基本と技術},
    author = {奥野 陽 and Graham Neubig and 萩原 正人},
    publisher = {翔泳社},
    month = {3},
    url = {http://www.shoeisha.co.jp/book/detail/9784798128528},
    year = {2016}
}