About: http://webisa.webdatacommons.org/112869996

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 dark part is placed on the lens to darken bright areas such as the sky, so balancing the exposure with the land.
http://www.w3.org/ns/prov#wasQuotedFrom	thelightweightphotographer.com