<https://www.vtupulse.com/cbcs-me-notes/2018-scheme-4-sem-me-vtu-cbcs-notes/#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.vtupulse.com/cbcs-me-notes/2018-scheme-4-sem-me-vtu-cbcs-notes/>