About: http://webisa.webdatacommons.org/359728528

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	NeXT is an example of a system which does not have <unistd.h> at all.
http://www.w3.org/ns/prov#wasQuotedFrom	netbsd.org