anchor.diff:                </td>
                 <td>
                   <strong>array</strong> <span class="tag tag-success">Required</span>
  -                <p>A collection of elements.</p>
  +                <p>A collection of <code>element</code> objects.</p>
                 </td>
               </tr>
               <tr>
  
positive.code: 
        <hr class="my-3">
  
        <h3>Template</h3>
  
        <p><code>mtype</code> must be <code>template</code>.</p>
  
        <h4>Button template</h4>
  
        <p>Compatible with Facebook Messenger's <a href="https://developers.facebook.com/docs/messenger-platform/send-api-reference/button-template">specification for the button template</a>.</p>
  
        <div class="card">
          <table class="table mb-0">
  
negative.code:         "title": "Hello world!",
          "image_url": "http://example.com/example.png",
          "subtitle": "This is an example"
        }]
      }
    }
  