<https://designermasks.com/masks/pros-and-cons-of-masks-that-tie-vs-masks-with-elastic-bands-around-ears/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://designermasks.com/masks/pros-and-cons-of-masks-that-tie-vs-masks-with-elastic-bands-around-ears/>