About: http://webisa.webdatacommons.org/325639385

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	However, it has been difficult to obtain an image with sufficient optical density by using the inks, particularly the black ink, disclosed in Japanese Patent Laid-Open No. 60-197778.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com