<https://secure.gravatar.com/avatar/0ce2e53788cddfa19efa5c0377b79dde?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.golinuxcloud.com/if-else-java-statement-examples/>