Resolve coreference using Stanford CoreNLP - unable to load parser model

I want to do a very simple job: given a string containing pronouns, I want to resolve them. for example, I want to turn the sentence "Mary has a little lamb. She is cute." in "Mary has a little lamb. Mary is cute.". I have tried to use Stanford CoreNLP. However, I seem unable to get the parser to start. I have imported all the included jars in my project using Eclipse, and I have allocated 3GB to the JVM (-Xmx3g). The error is very awkward: Exception in thread "main" java.lang.NoSuchMethodError: edu.stanford.nlp.parser.lexparser.LexicalizedParser.loadModel(Ljava/lang/String;[Ljava/lang/String;)Ledu/stanford/nlp/parser/lexparser/LexicalizedParser; I don't understand where that L comes from, I think it is the root of my problem... This is rather weird. I have tried to get inside the source files, but there is no wrong reference there. Code: ``` import edu.stanford.nlp.semgraph.SemanticGraphCoreAnnotations.CollapsedCCProcessedDependenciesAnnotation; import edu.stanford.nlp.dcoref.CorefCoreAnnotations.CorefChainAnnotation; import edu.stanford.nlp.dcoref.CorefCoreAnnotations.CorefGraphAnnotation; import edu.stanford.nlp.ling.CoreAnnotations.NamedEntityTagAnnotation; import edu.stanford.nlp.ling.CoreAnnotations.PartOfSpeechAnnotation; import edu.stanford.nlp.ling.CoreAnnotations.SentencesAnnotation; import edu.stanford.nlp.ling.CoreAnnotations.TextAnnotation; import edu.stanford.nlp.ling.CoreAnnotations.TokensAnnotation; import edu.stanford.nlp.trees.TreeCoreAnnotations.TreeAnnotation; import edu.stanford.nlp.ling.CoreLabel; import edu.stanford.nlp.dcoref.CorefChain; import edu.stanford.nlp.pipeline.*; import edu.stanford.nlp.trees.Tree; import edu.stanford.nlp.semgraph.SemanticGraph; import edu.stanford.nlp.util.CoreMap; import edu.stanford.nlp.util.IntTuple; import edu.stanford.nlp.util.Pair; import edu.stanford.nlp.util.Timing; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.Properties; public class Coref { /** * @param args the command line arguments */ public static void main(String[] args) throws IOException, ClassNotFoundException { // creates a StanfordCoreNLP object, with POS tagging, lemmatization, NER, parsing, and coreference resolution Properties props = new Properties(); props.put("annotators", "tokenize, ssplit, pos, lemma, ner, parse, dcoref"); StanfordCoreNLP pipeline = new StanfordCoreNLP(props); // read some text in the text variable String text = "Mary has a little lamb. She is very cute."; // Add your text here! // create an empty Annotation just with the given text Annotation document = new Annotation(text); // run all Annotators on this text pipeline.annotate(document); // these are all the sentences in this document // a CoreMap is essentially a Map that uses class objects as keys and has values with custom types List<CoreMap> sentences = document.get(SentencesAnnotation.class); for(CoreMap sentence: sentences) { // traversing the words in the current sentence // a CoreLabel is a CoreMap with additional token-specific methods for (CoreLabel token: sentence.get(TokensAnnotation.class)) { // this is the text of the token String word = token.get(TextAnnotation.class); // this is the POS tag of the token String pos = token.get(PartOfSpeechAnnotation.class); // this is the NER label of the token String ne = token.get(NamedEntityTagAnnotation.class); } // this is the parse tree of the current sentence Tree tree = sentence.get(TreeAnnotation.class); System.out.println(tree); // this is the Stanford dependency graph of the current sentence SemanticGraph dependencies = sentence.get(CollapsedCCProcessedDependenciesAnnotation.class); } // This is the coreference link graph // Each chain stores a set of mentions that link to each other, // along with a method for getting the most representative mention // Both sentence and token offsets start at 1! Map<Integer, CorefChain> graph = document.get(CorefChainAnnotation.class); System.out.println(graph); } } ``` Full stack trace: Adding annotator tokenize Adding annotator ssplit Adding annotator pos Loading POS Model [edu/stanford/nlp/models/pos-tagger/english-left3words/english-left3words-distsim.tagger] ... Loading default properties from trained tagger edu/stanford/nlp/models/pos-tagger/english-left3words/english-left3words-distsim.tagger Reading POS tagger model from edu/stanford/nlp/models/pos-tagger/english-left3words/english-left3words-distsim.tagger ... done [2.1 sec]. done [2.2 sec]. Adding annotator lemma Adding annotator ner Loading classifier from edu/stanford/nlp/models/ner/english.all.3class.distsim.crf.ser.gz ... done [4.0 sec]. Loading classifier from edu/stanford/nlp/models/ner/english.muc.distsim.crf.ser.gz ... done [3.0 sec]. Loading classifier from edu/stanford/nlp/models/ner/english.conll.distsim.crf.ser.gz ... done [3.3 sec]. Adding annotator parse Exception in thread "main" java.lang.NoSuchMethodError: edu.stanford.nlp.parser.lexparser.LexicalizedParser.loadModel(Ljava/lang/String;[Ljava/lang/String;)Ledu/stanford/nlp/parser/lexparser/LexicalizedParser; at edu.stanford.nlp.pipeline.ParserAnnotator.loadModel(ParserAnnotator.java:115) at edu.stanford.nlp.pipeline.ParserAnnotator.(ParserAnnotator.java:64) at edu.stanford.nlp.pipeline.StanfordCoreNLP$12.create(StanfordCoreNLP.java:603) at edu.stanford.nlp.pipeline.StanfordCoreNLP$12.create(StanfordCoreNLP.java:585) at edu.stanford.nlp.pipeline.AnnotatorPool.get(AnnotatorPool.java:62) at edu.stanford.nlp.pipeline.StanfordCoreNLP.construct(StanfordCoreNLP.java:329) at edu.stanford.nlp.pipeline.StanfordCoreNLP.(StanfordCoreNLP.java:196) at edu.stanford.nlp.pipeline.StanfordCoreNLP.(StanfordCoreNLP.java:186) at edu.stanford.nlp.pipeline.StanfordCoreNLP.(StanfordCoreNLP.java:178) at Coref.main(Coref.java:41)