containsVerb = containsVerbUndefined;
  public CKYItem setDataFrom(CKYItem other) {    this.label = other.label;    this.headWord = other.headWord;    this.leftSubcat = other.leftSubcat;    this.rightSubcat = other.rightSubcat;    this.headChild =  other.headChild;    this.leftChildren = other.leftChildren;    this.rightChildren = other.rightChildren;    this.leftPrevMods = other.leftPrevMods;    this.rightPrevMods = other.rightPrevMods;    this.start = other.start;    this.end = other.end;    this.leftVerb = other.leftVerb;    this.rightVerb = other.rightVerb;    this.stop = other.stop;    this.logTreeProb = other.logTreeProb;    this.logProb = other.logProb;    this.logPrior = other.logPrior;    return this;  }