title: How to get the display text and value in angular js material md-select
body: <p>How to get the display text and value in angular material md-select. I am able to get only the Model value(selected_value)  </p>
  
  <pre><code>&lt;md-input-container class="md-block"&gt;
    &lt;label&gt;Some Label&lt;/label&gt;
    &lt;md-select 
               ng-model="selected_value"&gt;
      &lt;md-option ng-value="item" ng-repeat="item in ctrl.items" &gt;
    &lt;/md-select&gt;
  &lt;/md-input-container&gt;
  </code></pre>
  
  <p>My list</p>
  
  <pre><code>[ID: name1, Name:value1]
  [ID: name2, Name:value2]
  [ID: name3, Name:value3]
  [ID: name4, Name:value4]
  </code></pre>
  
  <p>I need to get value1 if name1 is selected .</p>