About: http://webisa.webdatacommons.org/185993713

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	exit is a standard library function, so if you use it you need to #include <stdlib.h>, which is not necessary if you use return
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com