About: http://webisa.webdatacommons.org/230259383

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	The string prefix used to identify when a channel is a normal or broadcast channel, example: when you set this directive as ???bd_???, ???bd_ch1??? will be a broadcast channel
http://www.w3.org/ns/prov#wasQuotedFrom	nginx.org