<http://schema.org/description>
"Who doesn't love animated GIFs?  Seriously?  Well, Google announced on Google+ that they now let you search for animated images, as well as transparent images, using the advanced search feature.  Here"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-image-animated-gifs-16530.html>