About: http://webisa.webdatacommons.org/57980466

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	Tissue surface roughness, as well as obstructions such as glare, shadow, and blood, make achieving adequate focus difficult.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca