<https://www.r-bloggers.com/2020/09/using-dplyrfilter-when-the-condition-is-a-string/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.r-bloggers.com/2020/09/using-dplyrfilter-when-the-condition-is-a-string/>