docs: public List<Tree> getTreesWithLabels(String sentences, String label, List<String> labels) throws Exception {
          List<Tree> ret = new ArrayList<>();
          List<Tree> baseTrees = parser.getTreesWithLabels(sentences, label, labels);
          for (Tree t : baseTrees) {
              Tree binarized = treeTransformer.transform(t);
              binarized = cnfTransformer.transform(binarized);
              ret.add(binarized);
          }
  
          return ret;
  
      }