code: public static void displayCopyright() {
          System.out.println("Vietnamese Word Segmentation:");
          System.out.println("\tusing Conditional Random Fields");
          System.out.println("\ttesting our dataset of 8000 sentences with the highest F1-measure of 94%");
          System.out.println("Copyright (C) by Cam-Tu Nguyen {1,2} and Xuan-Hieu Phan {2}");
          System.out.println("{1}: College of Technology, Hanoi National University");
          System.out.println("{2}: Graduate School of Information Sciences, Tohoku University");
          System.out.println("Email: {ncamtu@gmail.com ; pxhieu@gmail.com}");
          System.out.println();
      }
docs: Display copyright.