<http://schema.org/category>
"All Things To Do In San Diego&gt;Explore&gt;Air &amp; Water&gt;Cruises &amp; Sailing"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.vimbly.com/sandiego/things-to-do-in-san-diego/maritime-museum-uss-midway-bay-cruise>