<http://webisa.webdatacommons.org/prov/67786773> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/441715755> . <http://webisa.webdatacommons.org/441715755> <http://www.w3.org/ns/prov#wasQuotedFrom> <macobserver.com> . <http://webisa.webdatacommons.org/441715755> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/441715755> <http://www.w3.org/ns/prov#value> "Since then, he???s written many books on marketing, his experiences at Apple, being an entrepreneur, and other topics." .