java - 如何在 Java 中使用斯坦福 CoreNLP 包提取三元组？

Question

我想要一个代码片段，它将输入一个句子或一组句子并输出或使用 Java 中的斯坦福 CoreNLP 包提取三元组（主语、谓语和宾语）

Answer 1

您是在寻找 OpenIE 三元组，还是更结构化的关系三元组（例如，类似per:city_of_birth）？对于前者，OpenIE 系统可能是您正在寻找的：https ://stanfordnlp.github.io/CoreNLP/openie.html 。从那里的示例复制：

import edu.stanford.nlp.ie.util.RelationTriple;
import edu.stanford.nlp.simple.*;

/**
 * A demo illustrating how to call the OpenIE system programmatically.
 */
public class OpenIEDemo {

  public static void main(String[] args) throws Exception {
    // Create a CoreNLP document
    Document doc = new Document("Obama was born in Hawaii. He is our president.");

    // Iterate over the sentences in the document
    for (Sentence sent : doc.sentences()) {
      // Iterate over the triples in the sentence
      for (RelationTriple triple : sent.openieTriples()) {
        // Print the triple
        System.out.println(triple.confidence + "\t" +
            triple.subjectLemmaGloss() + "\t" +
            triple.relationLemmaGloss() + "\t" +
            triple.objectLemmaGloss());
      }
    }
  }
}

或者，使用注释器 API：

import edu.stanford.nlp.ie.util.RelationTriple;
import edu.stanford.nlp.ling.CoreAnnotations;
import edu.stanford.nlp.pipeline.Annotation;
import edu.stanford.nlp.pipeline.StanfordCoreNLP;
import edu.stanford.nlp.naturalli.NaturalLogicAnnotations;
import edu.stanford.nlp.util.CoreMap;

import java.util.Collection;
import java.util.Properties;

/**
 * A demo illustrating how to call the OpenIE system programmatically.
 */
public class OpenIEDemo {

  public static void main(String[] args) throws Exception {
    // Create the Stanford CoreNLP pipeline
    Properties props = new Properties();
    props.setProperty("annotators", "tokenize,ssplit,pos,lemma,depparse,natlog,openie");
    StanfordCoreNLP pipeline = new StanfordCoreNLP(props);

    // Annotate an example document.
    Annotation doc = new Annotation("Obama was born in Hawaii. He is our president.");
    pipeline.annotate(doc);

    // Loop over sentences in the document
    for (CoreMap sentence : doc.get(CoreAnnotations.SentencesAnnotation.class)) {
      // Get the OpenIE triples for the sentence
      Collection<RelationTriple> triples = sentence.get(NaturalLogicAnnotations.RelationTriplesAnnotation.class);
      // Print the triples
      for (RelationTriple triple : triples) {
        System.out.println(triple.confidence + "\t" +
            triple.subjectLemmaGloss() + "\t" +
            triple.relationLemmaGloss() + "\t" +
            triple.objectLemmaGloss());
      }
    }
  }
}