About: http://webisa.webdatacommons.org/17523642

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	Specifically, the remaining air cylinder or linear actuator must be capable of retracting its shaft, thereby pulling on one terminus the chain and extending the spring or other device attached to the other terminus of the chain.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com