About: http://webisa.webdatacommons.org/41776530

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	In all display types described above, problems may be encountered in correctly setting grey scale levels, ensuring that the grey scales are uniform across the displays and that they do not drift in time.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com