About: http://webisa.webdatacommons.org/193750161

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	Two types of pressure-markable chart paper are commonly available, one type including a base with a black or other dark upper surface, and an opaque wax film of another color such as white.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com