<https://gmatclub.com/forum/a-citrus-fruit-grower-receives-15-for-each-crate-of-oranges-136567.html#p1606220>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://gmatclub.com/forum/a-citrus-fruit-grower-receives-15-for-each-crate-of-oranges-136567.html>