Stanford NLP:如何对单个词进行词法化? [英] Stanford NLP: How to lemmatize single word?

问题描述

我知道如何注释一个句子并获得每个单词的引理，但是如果我只想对一个 单词进行词义化，我不知道该怎么做.我尝试过

I know how I can annotate a sentence and get the lemma of each word but I don't know how to do it if I just want to lemmatize a single word. I tried

Annotation tokenAnnotation = new Annotation("wedding");
List<CoreMap> list = tokenAnnotation.get(SentencesAnnotation.class);

String tokenLemma = list
                        .get(0).get(TokensAnnotation.class)
                        .get(0).get(LemmaAnnotation.class);

，但是tokenAnnotation只有一个TextAnnotation键，这意味着list将在此处null.

but the tokenAnnotation has only one TextAnnotation key which means list will be nullhere.

那么我该如何对单个词进行词素化?

So how can I lemmatize a single word?

推荐答案

有两种选择:您可以通过StanfordCoreNLP管道为Annotation对象添加注释:

There are two options: you can either annotate you Annotation object through a StanfordCoreNLP pipeline:

StanfordCoreNLP pipeline = new StanfordCoreNLP(new Properties(){{
  setProperty("annotators", "tokenize,ssplit,pos,lemma");
}});

Annotation tokenAnnotation = new Annotation("wedding");
pipeline.annotate(tokenAnnotation);  // necessary for the LemmaAnnotation to be set.
List<CoreMap> list = tokenAnnotation.get(SentencesAnnotation.class);
String tokenLemma = list
                        .get(0).get(TokensAnnotation.class)
                        .get(0).get(LemmaAnnotation.class);

另一种选择是使用SimpleCoreNLP API:

The other option is to use the SimpleCoreNLP API:

String tokenLemma = new Sentence("wedding").lemma(0);

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