About: http://webisa.webdatacommons.org/291450429

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	Most SNSs also facilitate public and private messaging, photo, video and other content
http://www.w3.org/ns/prov#wasQuotedFrom	biomedcentral.com