java - NLP - 我能找出 "it"是谁吗？

Question

我正在使用斯坦福解析器从文本中逐句获取依赖关系，如下所示:

    Reader reader = new StringReader("The room was not nice. It was bright, but cold.");
    TreebankLanguagePack tlp = new PennTreebankLanguagePack();
    GrammaticalStructureFactory gsf = tlp.grammaticalStructureFactory();

    // the dependencies of the entire text
    List<TypedDependency> textDependencies = new ArrayList<TypedDependency>();
    // get the dependencies of each sentence and add it to the list
    for (List<HasWord> sentence : new DocumentPreprocessor(reader)) {
        Tree parse = lp.apply(sentence);
        GrammaticalStructure gs = gsf.newGrammaticalStructure(parse);
        textDependencies.addAll(gs.typedDependenciesCCprocessed());
    }

运行上面的代码后，名为 textDependencies 的列表将包含以下依赖项:

    det(room-2, The-1)
    nsubj(nice-5, room-2)
    cop(nice-5, was-3)
    neg(nice-5, not-4)
    root(ROOT-0, nice-5)
    nsubj(warm-3, It-1)
    nsubj(noisy-6, It-1)
    cop(warm-3, was-2)
    root(ROOT-0, warm-3)
    conj_but(warm-3, noisy-6)

有没有办法找出“它”是谁，并得到一些东西来表明它实际上是房间？

Answer 1

您想要的称为共指解析。斯坦福 CoreNLP does that already 。我找不到以编程方式完成的演示，但如果您正在运行预编译的可执行文件，则需要将 dcoref 添加到注释器列表中，如下所示:

java -cp <all jars> edu.stanford.nlp.pipeline.StanfordCoreNLP -annotators tokenize,ssplit,pos,lemma,ner,parse,dcoref -file input.txt