About: http://webisa.webdatacommons.org/263137787

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	Since a semaphore is an operating system variable in a different context (i.e., an operating system context) than an application context, system resources are necessary to switch contexts.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com