Treat English word dependency with StanfordPosDependencyAnnotator – NLP4J, Java

Is it easy to isolate English word dependencies from natural sentences? It’s easy!


// <!-- -->
import nlp4j.Document;
import nlp4j.Keyword;
import nlp4j.KeywordWithDependency;
import nlp4j.impl.DefaultDocument;
import nlp4j.stanford.StanfordPosDependencyAnnotator;

public class StanfordPosDependencyAnnotatorExample2 {
	public static void main(String[] args) throws Exception {
		Document doc = new DefaultDocument();
		doc.putAttribute("text", "I eat sushi with chopsticks.");
		StanfordPosDependencyAnnotator ann = new StanfordPosDependencyAnnotator();
		ann.setProperty("target", "text");
		for (Keyword kwd : doc.getKeywords()) {
			if (kwd instanceof KeywordWithDependency) {
				KeywordWithDependency kd = (KeywordWithDependency) kwd;
				// Print dependency as a XML
	private static void print(KeywordWithDependency kd) {
		kd.getChildren().forEach(kwd -> {
			System.err.println(kd.getLex() + " -> (" + kwd.getRelation() + ") " + kwd.getLex());


<?xml version="1.0" encoding="UTF-8"?>
<w begin="2" depth="0" end="5" facet="VBP" id="0" lex="eat" relation="root" sequence="0" str="eat">
    <w begin="0" depth="1" end="1" facet="PRP" id="1" lex="I" relation="nsubj" sequence="1" str="I"/>
    <w begin="6" depth="1" end="11" facet="NN" id="2" lex="sushi" relation="obj" sequence="2" str="sushi"/>
    <w begin="17" depth="1" end="27" facet="NNS" id="3" lex="chopstick" relation="obl" sequence="3" str="chopsticks">
        <w begin="12" depth="2" end="16" facet="IN" id="4" lex="with" relation="case" sequence="4" str="with"/>
    <w begin="27" depth="1" end="28" facet="." id="5" lex="." relation="punct" sequence="5" str="."/>

eat -> (nsubj) I
eat -> (obj) sushi
eat -> (obl) chopstick
chopstick -> (case) with
eat -> (punct) .