code: public NerResultSet process(final String text) {
          // program pipeline: (Text) ------> (Phrases without classified) ------> (Phrases classified)
          //                         extractor                            classifier
          final NerResultSet rs = extractor.process(text);
          classifier.process(rs);
          if (tracing) trace = classifier.trace;
          return rs;
      }
docs: Process the text, and return a NerResultSet.
  <p/>
  See NerResultSet class.