<https://www.xcoser.com/blogs/news/the-31st-overwatch-hero-sigma-mysterious-scientist-who-manipulates-gravity>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.xcoser.com/blogs/news/the-31st-overwatch-hero-sigma-mysterious-scientist-who-manipulates-gravity>