About: http://webisa.webdatacommons.org/281753663

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	The markings 50, 55 and 60 are preferably identified by labels such as the words knife, pencil and pivot or by abbreviations thereof.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com