<http://schema.org/description>
"Learn how to create a slideshow presentation using Microsoft PowerPoint 2003. Topics include creating and editing slides, inserting images/clipart, and running your slideshow."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.nypl.org/events/programs/2013/06/25/ms-powerpoint-beginners?pref=node_type_search%2Fevent_class>