About: http://webisa.webdatacommons.org/111095191

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	A modern air louver is used for the same concept of allowing air in and keeping elements out, however, the new style is manufactured from various materials including plastic, wood and metals.
http://www.w3.org/ns/prov#wasQuotedFrom	airlouver.net