CODEWITHSUNDEEP
javanlpstanford-nlp
moderntrollfare
moderntrollfare

Reputation: 1

Stanford OpenIE Example Code would not run properly

this is my first time here posting something; so if I have demonstrated any bad practice- please tell.

So currently I am trying to use OpenIE from Stanford to extract information from web-mined data. As I am really new to Java, I just copied the example code snippet from their page: http://nlp.stanford.edu/software/openie.shtml

Which looks like this:

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

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

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

    for (CoreMap sentence : doc.get(CoreAnnotations.SentencesAnnotation.class)) {
      Collection<RelationTriple> triples = sentence.get(NaturalLogicAnnotations.RelationTriplesAnnotation.class);
      for (RelationTriple triple : triples) {
        System.out.println(triple.confidence + "\t" +
            triple.subjectLemmaGloss() + "\t" +
            triple.relationLemmaGloss() + "\t" +
            triple.objectLemmaGloss());
      }
    }
  }

Then I compiled it into a class and put it into the openIE jar from their site.

I ran such a command, which is nearly identical to their command-line invocation example:

java -mx1g -cp stanford-openie.jar:stanford-openie-models.jar Example

But in the end I got such an error:

Loading parser from serialized file edu/stanford/nlp/models/lexparser/englishPCFG.ser.gz ... Exception in thread "main" edu.stanford.nlp.io.RuntimeIOException: java.io.IOException: Unable to resolve "edu/stanford/nlp/models/lexparser/englishPCFG.ser.gz" as either class path, filename or URL

While their command line invocation would work as shown on their page, I think this is a problem with my Java skills. However I couldn't figure out how to fix this, nor the relevant questions asked on Stackoverflow would help. Why cannot it resolve the classpath?

Note: I saw somebody posting about having CoreNLP in their workspace at the same time, but I am sure I am NOT putting those JARs together under the same directory.

Upvotes: 0

Views: 1124

Answers (1)

Bonson
Bonson

Reputation: 1468

Change the setProperty line to the following. I was facing the same issue. A change in this line made it work.

Also, you should include the CoreNLP and the Openie jars in the path to help it work properly. 

props.setProperty("annotators", "tokenize,ssplit,pos,lemma,depparse,natlog,openie");

Upvotes: 2

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