<http://schema.org/description>
"Happy Earth Day everyone!As expected, most of the search engines have special logos for the day.   Google and Yahoo's logos are animated, Google has a JPG that rotates between images (like an animated"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/earth-day-2012-15045.html>