<https://www.guitar4fans.com/video/revv-g2-vs-g3-vs-g4-with-black-spirit-200-combo-and-joss-allen/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.guitar4fans.com/video/revv-g2-vs-g3-vs-g4-with-black-spirit-200-combo-and-joss-allen/>