<https://www.emailmarker.com/blog/#/schema/person/2cc9b666a4531d40eb5e198c0744b853>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.emailmarker.com/blog/email-bounce-and-email-bounce-rate-what-is-it-and-how-to-improve-it/>