About: http://webisa.webdatacommons.org/123353140

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	2 spirit levels, a bubble on top of the compass, and one when the tool is turned on the side, there is a notch where the bubble settles when level.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com