<http://schema.org/description>
"Learn how to create a slideshow presentation using Microsoft PowerPoint 2003. Topics include creating and editing slides, inserting images and clipart, and running your slideshow."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.nypl.org/events/programs/2013/05/29/ms-powerpoint-2010-beginners-0>