Examples of PennTreeReader

edu.stanford.nlp.trees.PennTreeReader

This class implements the TreeReader interface to read Penn Treebank-style files. The reader is implemented as a push-down automaton (PDA) that parses the Lisp-style format in which the trees are stored. This reader is compatible with both PTB and PATB trees.
One small detail to note is that the PennTreeReader silently replaces \* with * and \/ with /. Two possible designs for this were to make the PennTreeReader always do this or to make the TreeNormalizers do this. We decided to put it in the PennTreeReader class itself to avoid the problem of people making new TreeNormalizers and forgetting to include the unescaping. @author Christopher Manning @author Roger Levy @author Spence Green


  private static SemanticGraph makeGraph() {
    Tree tree;


    try {
      tree = new PennTreeReader(new StringReader("(S1 (S (S (S (NP (DT The) (NN CD14) (NN LPS) (NN receptor)) (VP (VBZ is) (, ,) (ADVP (RB however)) (, ,) (ADVP (RB up)) (VP (VBN regulated) (PRN (-LRB- -LRB-) (FRAG (RB not) (ADJP (RB down) (VBN regulated))) (-RRB- -RRB-)) (PP (IN in) (NP (JJ tolerant) (NNS cells)))))) (, ,) (CC and) (S (NP (NN LPS)) (VP (MD can) (, ,) (PP (IN in) (NP (NN fact))) (, ,) (ADVP (RB still)) (VP (VB lead) (PP (TO to) (NP (NP (NN activation)) (PP (IN of) (NP (JJ tolerant) (NNS cells))))) (SBAR (IN as) (S (VP (VBN evidenced) (PP (IN by) (NP (NP (NN mobilization)) (PP (IN of) (NP (DT the) (NN transcription) (NN factor) (NP (NP (JJ nuclear) (NN factor) (NN kappa) (NN B)) (PRN (-LRB- -LRB-) (NP (NN NF-kappa) (NN B)) (-RRB- -RRB-)))))))))))))) (. .)))"),
                                new LabeledScoredTreeFactory()).readTree();
    } catch (IOException e) {
      // the tree should parse correctly
      throw new RuntimeException(e);
    }

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Examples of PennTreeReader

Examples of edu.stanford.nlp.trees.PennTreeReader