<https://rubberdance.blogspot.com/2020/09/cas-butterfly-on-card-and-envelope-by.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://rubberdance.blogspot.com/2020/09/cas-butterfly-on-card-and-envelope-by.html?showComment=1602446185830>