About: http://webisa.webdatacommons.org/213243458

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	Since you mention yum, I am going to assume a redhat based system, such as CentOS. If you have installed php using yum and you have apache installed, have you actually started apache? ('service httpd start').
http://www.w3.org/ns/prov#wasQuotedFrom	serverfault.com