About: http://webisa.webdatacommons.org/267992521

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	true if the character is a member of any of the specified character classes, false otherwise. static int value(char_type ch, int radix) ;
http://www.w3.org/ns/prov#wasQuotedFrom	boost.org