<https://aarthikvoice.com/archives/category/%e0%a4%ac%e0%a5%88%e0%a4%95%e0%a4%bf%e0%a4%99%e0%a5%8d%e0%a4%97/%e0%a4%ac%e0%a5%88%e0%a4%82%e0%a4%95>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://aarthikvoice.com/archives/2144>