<https://blog.medcityinternationalacademy.com/2021/06/oet-writing-use-of-was-has-been-in.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.medcityinternationalacademy.com/search/label/tips%20to%20get%20a%20high%20score>