<https://www.amansmathsblogs.com/#/schema/person/d9ca6fd21cb3b02304fa3889bc216306>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.amansmathsblogs.com/ssc-chsl-mensuration-3d-questions-answers-set-4/>