title: Data from factory is undefined
body: <p>I'm trying to play with angularJS. </p>
  
  <p>I wrote this easy example :</p>
  
  <pre><code>var myApp = angular.module('myApp',[]);
  
  myApp.factory( 'Data' , function() {
      return { message: "I'm data from a service" } 
  });
  function FirstCtrl($scope) {
      $scope.data = Data;
  }
  function SecondCtrl($scope) {
      $scope.data = Data; 
  }
  </code></pre>
  
  <p>but i get the following error message:</p>
  
  <pre><code>ReferenceError: Data is not defined
  </code></pre>
  
  <p>What am i doing wrong</p>