<http://schema.org/description>
"Saturday marks the 20th birthday of the Hubble Telescope launch.  Specifically, April 24, 1990 was the launch date and to remember the date, Google posted a special logo on their home page.  The logo "^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/022082.html>