anchor.diff:  <form role="form">
     <div class="form-group">
  -    <label for="exampleInputEmail1">Email</label>
  +    <label class="control-label" for="exampleInputEmail1">Email</label>
       <input type="email" class="form-control" id="exampleInputEmail1" placeholder="Enter email">
       <p class="help-block">Lorem ipsum dolor sit amet</p>
     </div>
   
     <div class="form-group">
  -    <label for="exampleInputPassword1">Password</label>
  +    <label class="control-label" for="exampleInputPassword1">Password</label>
       <input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
       <p class="help-block">Lorem ipsum dolor sit amet</p>
     </div>
   
     <div class="form-group">
  -    <label for="exampleInputFile">File</label>
  +    <label class="control-label" for="exampleInputFile">File</label>
       <input type="file" id="exampleInputFile">
       <p class="help-block">Example block-level help text here.</p>
     </div>
  
positive.code:   </div>
  
    <div class="form-group">
      <label>Sex</label>
      <div class="radio">
        <label>
          <input type="radio" name="optionsRadios" id="optionsRadios1" value="option1" checked>
  
negative.code:   </div>
  
    <div class="form-group">
      <label class="control-label">Choices</label>
      <div class="checkbox">
        <label>
          <input type="checkbox" name="optionsRadios" id="optionsCheckbox1" value="option1" checked>
  