code: public static AnalysisEngine defaultAnalysisEngine() {
          try {
              if (defaultAnalysisEngine == null)
  
                  defaultAnalysisEngine = AnalysisEngineFactory.createEngine(
                                  AnalysisEngineFactory.createEngineDescription(SentenceAnnotator.getDescription(),
                                                  TokenizerAnnotator.getDescription()));
  
              return defaultAnalysisEngine;
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }
docs: Creates a tokenization,/stemming pipeline
  @return a tokenization/stemming pipeline