About: http://webisa.webdatacommons.org/193041296

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 watermark signal is a signal as used for expressing a wave of which the length and propagation direction can be arbitrarily changed by the way of arranging dots (black pixels).
http://www.w3.org/ns/prov#wasQuotedFrom	google.es