使用 CoreNLP 解析共指

Question

我正在尝试让 CoreNLP 访问 CorefChains。我的意图是像“他，她，......”这样的词将被他们最好的提及所取代，但我无法访问 CorefChains（它们始终为空）。    public static void main (String [] args) {         Properties props = new Properties();         props.put("annotators", "tokenize,ssplit,pos,lemma,ner,parse,dcoref");         props.put("dcoref.score", true);         StanfordCoreNLP corefPipeline = new StanfordCoreNLP(props);         String text = "Barack Obama was born in Hawaii.  He is the president. Obama was elected in 2008.";         Annotation document = new Annotation(text);         corefPipeline.annotate(document);         // Chains is always null         Map<Integer, CorefChain> chains = document.get(CorefCoreAnnotations.CorefChainAnnotation.class);}

Answer 1

我认为这是一个导入类问题。这个工作正常：

import java.util.Map;

import java.util.Properties;

import edu.stanford.nlp.coref.CorefCoreAnnotations;

import edu.stanford.nlp.coref.data.CorefChain;

import edu.stanford.nlp.pipeline.Annotation;

import edu.stanford.nlp.pipeline.StanfordCoreNLP;

public class App {

    public static void main(String[] args) {

        Properties props = new Properties();

        props.put("annotators", "tokenize,ssplit,pos,lemma,ner,parse,dcoref");

        props.put("dcoref.score", true);

        StanfordCoreNLP corefPipeline = new StanfordCoreNLP(props);

        String text = "Barack Obama was born in Hawaii.  He is the president. Obama was elected in 2008.";

        Annotation document = new Annotation(text);

        corefPipeline.annotate(document);

        // Chains is always null

        Map<Integer, CorefChain> chains = document.get(CorefCoreAnnotations.CorefChainAnnotation.class);

        System.out.println(chains);

    }

}

和输出：

{1=CHAIN1-["Barack Obama" in sentence 1, "He" in sentence 2, "the president" in sentence 2, "Obama" in sentence 3], 2=CHAIN2-["Hawaii" in sentence 1], 6=CHAIN6-["2008" in sentence 3]}

这是我在 pom.xml 中的内容：

<dependencies>

    <dependency>

        <groupId>edu.stanford.nlp</groupId>

        <artifactId>stanford-corenlp</artifactId>

        <version>3.9.2</version>

    </dependency>

    <dependency>

        <groupId>edu.stanford.nlp</groupId>

        <artifactId>stanford-corenlp</artifactId>

        <version>3.9.2</version>

        <classifier>models</classifier>

    </dependency>

</dependencies>