docs: @Override
      public DataSet vectorize(InputStream is, String label) {
          try {
              BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
              String line = "";
              StringBuilder builder = new StringBuilder();
              while ((line = reader.readLine()) != null) {
                  builder.append(line);
              }
              return vectorize(builder.toString(), label);
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }