text: function Dog (breed) {
      this.breed = breed;
    }
    
    var scoobydoo = new Dog("Great Dane");
    
    scoobydoo.bark = function() {
        return "Woof";
    };
    
    var snoopy = new Dog("Beagle");
    
    snoopy.bark = function() {
      return "Woof";
    };