anchor.diff:  
   Element questionDataToView(Map data) {
     int id = data['id'];
  +  int seq = data['sequence'];
     String question = data['question'];
  -  int seq = data['sequence'];
  +  String answer = questionIdToAnswer[id];
   
     DivElement questionDiv = new DivElement();
     questionDiv.classes.add('form-group');
  
positive.code: 
  void answerSheetFetched(String responseText) {
    Map data = JSON.decode(responseText);
    for (Map answer in data['answers']) {
      questionIdToAnswerId[answer['question']] = answer['id'];
    }
  }
  
negative.code: Map answerInputIds = {};
  
  Map questionIdToAnswerId = {};
  
  Map questionIdToAnswer = {};
  
  
  getContext(String key) {
  