<https://mltmpgeox6sf.i.optimole.com/cb:_MbK~1ed1e/w:150/h:150/q:mauto/rt:fill/g:ce/f:avif/https://nc.edu/wp-content/uploads/2018/01/iStock-688304346-1.jpg>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://nc.edu/blog/tag/study-selection-and-classification/>