About: http://webisa.webdatacommons.org/444662921

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	Social networking systems allow individuals with common interests and activities to connect and interact with one another using services, such as Facebook and Twitter.
http://www.w3.org/ns/prov#wasQuotedFrom	alz.org