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如果我想获取每个单词对应的短语标签,我该如何获取?

例如 :

在这句话中,

我的狗也喜欢吃香肠。

我可以在斯坦福 NLP 中得到一个解析树,例如

(ROOT (S (NP (PRP$ My) (NN dog)) (ADVP (RB also)) (VP (VBZ likes) (NP (JJ eating) (NN sausage))) (. .)))

在上述情况下,我想获得与每个单词对应的短语标签,例如

(My - NP), (dog - NP), (also - ADVP), (likes - VP), ...

有什么方法可以简单地提取短语标签吗?

请帮我。

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1 回答 1

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//I guess this is how you get your parse tree.
Tree tree = sentAnno.get(TreeAnnotation.class);

//The children of a Tree annotation is an array of trees.
Tree[] children = parent.children() 

//Check the label of any sub tree to see whether it is what you want (a phrase)
for (Tree child: children){
   if (child.value().equals("NP")){// set your rule of defining Phrase here
          List<Tree> leaves = child.getLeaves(); //leaves correspond to the tokens
          for (Tree leaf : leaves){ 
            List<Word> words = leaf.yieldWords();
            for (Word word: words)
                System.out.print(String.format("(%s - NP),",word.word()));
          }
   }
}

该代码尚未经过全面测试,但我认为它大致可以满足您的需求。更重要的是我没有写任何关于递归访问子树的文章,但我相信你应该能够做到这一点。

于 2013-01-22T21:47:57.490 回答