<https://www.examcertificates.com/what-data-cannot-be-evaluated-with-a-standard-or-general-performance-report/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.examcertificates.com/what-data-cannot-be-evaluated-with-a-standard-or-general-performance-report/>