About: http://webisa.webdatacommons.org/178805696

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 indicator 30 might be an ink, possibly microencapsulated, which changes color gradually upon exposure to air, light or other ambient condition.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr