title: Kibana visualization for grouping and filter
body: <p>I have my data in Elasticsearch like below<br>
  <a href="https://i.stack.imgur.com/cRpAg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cRpAg.png" alt="enter image description here" /></a>
  <br>I'm trying to create a pie chart in kibana which shows the percentage of people who visited both UK and India and % of people who visited only India and % percentage of people who visited only UK.
  <br> But I'm not able to find a way to group by person name and do filter on the country visited in the pie chart in kibana. Any way to do this?</p>