About: http://webisa.webdatacommons.org/10166061

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	However, cylinders in particular conditions (such as those used on external doors) must be lubricated at least four times per year and whenever users experience difficulty in turning or inserting keys.
http://www.w3.org/ns/prov#wasQuotedFrom	mul-t-lockusa.com