Passing services to services as dependency

Below I have a factory called Position that returns data that the whole app needs to use about the users current position and other models. Under that is a service called Romanize that contacts an external URL which provides a kind of translation, but Romanize needs to access to the app data provided by Position. I tried with the usual DI but it fails. How can I inject Position into Romanize as a dependency?

app.factory('Position', function(){
    return{
      questionNumber: 0,
      tutorialNumber: 0,
      sectionNumber: 0,
      sections: sections
    }
});

app.factory('Romanize', ['$http', 'Position', function($http){
    alert(Position);
    return{
      Position: Position,
      get: function(){
          $http.get(Position.sections[Position.sectionNumber].romanizeService).success(function(data) {
                return data;
            });
        }
    };
}]);