About: http://webisa.webdatacommons.org/213070251

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	PlaceholderA box with dotted borders that is part of most slide layouts and that holds text or objects such as charts, tables, and pictures.
http://www.w3.org/ns/prov#wasQuotedFrom	prenhall.com