code: String print() {
  		StringBuilder sb = new StringBuilder();
  		for (String subject : subjectToPredicates.keySet()) {
  			sb.append(subject);
  			sb.append(" ");
  			boolean semiColonSeparator = false;
  			for (String predicate : subjectToPredicates.get(subject)) {
  				if (semiColonSeparator) {
  					sb.append(" ; ");
  				}
  				sb.append(predicate);
  				sb.append(" ");
  				semiColonSeparator = true;
  
  				boolean commaSeparator = false;
  				for (String object : predicateToObjects.get(predicate+ "_" + subject)) {
  					if (commaSeparator) {
  						sb.append(" , ");
  					}
  					sb.append(object);
  					commaSeparator = true;
  				}
  			}
  			sb.append(" ");
  			sb.append(".");
  			sb.append(" ");
  		}
  		return sb.toString();
  	}
docs: Prints the container.
  
  @return The Turtle short representation.