<https://www.pewforum.org/religious-landscape-study/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.pewforum.org/religious-landscape-study/compare/racial-and-ethnic-composition/by/religious-denomination/among/educational-distribution/high-school-or-less/religious-tradition/mainline-protestant/>