public double[][] compute(RDFData data) {
   init(data.getDataset(), data.getInstances(), data.getBlackList());
   return kernel.compute(graph);
 }
 public SparseVector[] computeFeatureVectors(RDFData data) {
   init(data.getDataset(), data.getInstances(), data.getBlackList());
   return kernel.computeFeatureVectors(graph);
 }