TupleProjectByIDS project = new TupleProjectByIDS();
project.addColumnIDs(new int[] {4});
project.connectDataInput(union[i].getDataOutput());
Classify classify = new Classify();
classify.connectDataInput(union[i].getDataOutput());
classify.connectClassifierInput(classifier[i].getResultOutput());
Evaluate evaluate = new Evaluate();
evaluate.connectExpectedDataInput(project.getDataOutput());
evaluate.connectPredictedDataInput(classify.getResultOutput());