About: http://webisa.webdatacommons.org/320039251

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	Guide wire marker 51 can take any form but preferably is a painted circle or a spot provided a predetermined distance from the forwardmost end of guide wire 50 for reasons to be explained in greater detail below.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com