Stanford CoreNLP Chinese coreference resolution - stanford-nlp

Question

I want to use stanford coreNLP to process some Chinese Coreference resolution.My code is below:
import java.util.Properties;
import edu.stanford.nlp.coref.CorefCoreAnnotations;
import edu.stanford.nlp.coref.data.CorefChain;
import edu.stanford.nlp.coref.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;
public class CorefTest {
public static void main(String[] args) throws Exception {
StanfordCoreNLP pipline = new StanfordCoreNLP("StanfordCoreNLP-chinese.properties");
Annotation document = new Annotation("奥巴马出生在夏威夷，他是美国总统，他在2008年当选");
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);
}
}
}
}
And it give the result :
---
coref chains
---
mentions
奥巴马出生在夏威夷 ， 他是美国总统 ， 他在2008年当选
Where nothing in the coref chains,I do set the environment right, and it does support chinese , but how can I get coref chains right?

Answer 1

You are making the pipeline twice in your code.
Note: make sure to add this to your code:
import edu.stanford.nlp.util.StringUtils;
You code should be like this:
Properties props = StringUtils.argsToProperties("-props", "StanfordCoreNLP-chinese.properties");
props.setProperty("annotators", "tokenize,ssplit,pos,lemma,ner,parse,mention,coref");
StanfordCoreNLP pipeline = new StanfordCoreNLP(props);