About: http://webisa.webdatacommons.org/199501472

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	I provides more space between bottom board and brood chamber, thus varroa mites have a harder time reattaching to other bees when they fall off.There are a few more reasons, but my brain is tired so I can not think of them right now.
http://www.w3.org/ns/prov#wasQuotedFrom	beemaster.com