About: http://webisa.webdatacommons.org/337237151

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	My reading of the file test operators perldoc (perl v5.14.2 on 32 bit Linux) suggests that the -f test will return true iff the file being tested is a regular file.
http://www.w3.org/ns/prov#wasQuotedFrom	perlmonks.org