public TaggingData(ContextGenerator cntxGen){
  cntxGenVector=new ArrayList<ContextGenerator>();
  cntxGenVector.add(cntxGen);
}

public TaggingData ( ContextGenerator cntxGen ) { cntxGenVector = new ArrayList < ContextGenerator > ( ) ; cntxGenVector . add ( cntxGen ) ; }
instantiates a new tagging data .
