About: http://webisa.webdatacommons.org/151369848

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	Twitter is a free social networking service that allows you to read and write short messages (called tweets).
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov