About: http://webisa.webdatacommons.org/340168313

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	John also is an active contributor to the PHP core as the author of the tidy extension, a member of the Zend Education Advisory Board, and frequent speaker at PHP-related conferences worldwide.
http://www.w3.org/ns/prov#wasQuotedFrom	amazon.com