title: I want to extract values of cx,cy,r which all reside in column 3
body: <p>Below is my sample data in CSV file</p>
  
  <pre class="lang-csv prettyprint-override"><code>filename, file_size, region_shape_attributes
  1.jpg, 2551045, {"name":"circle","cx":371,"cy":2921,"r":73}
  2.jpg, 2551045, {"name":"circle","cx":505,"cy":2951,"r":62}
  3.jpg, 2551045, {"name":"circle","cx":619,"cy":2865,"r":83}
  4.jpg, 2551045, {"name":"circle","cx":769,"cy":2793,"r":82}
  5.jpg, 2551045, {"name":"circle","cx":885,"cy":2669,"r":87}
  </code></pre>
  
  <p>I want output as follow:</p>
  
  <pre class="lang-none prettyprint-override"><code>name   cx  cy   r
  circle 371 2921 73
  circle 371 2921 73
  circle 371 2921 73
  </code></pre>