我正在使用Stanford CoreNLP。我需要在输入文本中检测并识别每个CorefChain的“Coreference set”和“代表性提及”:
例如: 输入: 奥巴马于1996年当选为伊利诺伊州参议员,并在那里任职八年。 2004年,他以创纪录的多数票当选伊利诺伊州参议员,并于2007年2月宣布参选总统。
输出:使用“Pretty Print”我可以得到以下输出:
**Coreference set:
(2,4,[4,5]) -> (1,1,[1,2]), that is: "he" -> "Obama"
(2,24,[24,25]) -> (1,1,[1,2]), that is: "his" -> "Obama"
(3,22,[22,23]) -> (1,1,[1,2]), that is: "Obama" -> "Obama"**
但是,我需要以编程方式识别和检测上面的输出,称为“Coreference set”。 (我的意思是我需要识别所有的对象:“他” - >“奥巴马”)
注意:我的基本代码如下(来自http://stanfordnlp.github.io/CoreNLP/coref.html):
import edu.stanford.nlp.hcoref.CorefCoreAnnotations;
import edu.stanford.nlp.hcoref.data.CorefChain;
import edu.stanford.nlp.hcoref.data.Mention;
import edu.stanford.nlp.ling.CoreAnnotations;
import edu.stanford.nlp.pipeline.Annotation;
import edu.stanford.nlp.pipeline.StanfordCoreNLP;
import edu.stanford.nlp.util.CoreMap;
import java.util.Properties;
public class CorefExample {
public static void main(String[] args) throws Exception {
Annotation document = new Annotation("Obama was elected to the Illinois state senate in 1996 and served there for eight years. In 2004, he was elected by a record majority to the U.S. Senate from Illinois and, in February 2007, announced his candidacy for President.");
Properties props = new Properties();
props.setProperty("annotators", "tokenize,ssplit,pos,lemma,ner,parse,mention,coref");
StanfordCoreNLP pipeline = new StanfordCoreNLP(props);
pipeline.annotate(document);
System.out.println("---");
System.out.println("coref chains");
for (CorefChain cc : document.get(CorefCoreAnnotations.CorefChainAnnotation.class).values()) {
System.out.println("\t"+cc);
}
for (CoreMap sentence : document.get(CoreAnnotations.SentencesAnnotation.class)) {
System.out.println("---");
System.out.println("mentions");
for (Mention m : sentence.get(CorefCoreAnnotations.CorefMentionsAnnotation.class)) {
System.out.println("\t"+m);
}
}
}
}
///// Any Idea? THANK YOU in ADVANCE
答案 0 :(得分:2)
CorefChain包含该信息。
例如,您可以获得:
List<CorefChain.CorefMention>
使用此方法:
cc.getMentionsInTextualOrder();
这将为您提供该特定群集文档中的所有CorefChain.CorefMention。
您可以使用此方法获得代表性提及:
cc.getRepresentativeMention();
CorefChain.CorefMention代表coref集群中的特别提及。您可以从CorefChain.CorefMention(句子编号,句子中的提及编号)中获取诸如完整字符串和位置之类的信息:
for (CorefChain.CorefMention cm : cc.getMentionsInTextualOrder()) {
String textOfMention = cm.mentionSpan;
IntTuple positionOfMention = cm.position;
}
以下是CorefChain的javadoc链接:
http://nlp.stanford.edu/nlp/javadoc/javanlp/edu/stanford/nlp/dcoref/CorefChain.html
以下是CorefChain.CorefMention的javadoc链接:
http://nlp.stanford.edu/nlp/javadoc/javanlp/edu/stanford/nlp/dcoref/CorefChain.CorefMention.html