<http://schema.org/description>
"As I reported at Search Engine Land via Google Operating System - Google has decommissioned the tilde (i.e. ~) search operator from working.Google's Dan Russell, a  Search Research Scientist, said it "^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/tilde-google-search-feature-gone-16977.html>