About: http://webisa.webdatacommons.org/405463280

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 progressive blindness of Usher syndrome results from retinitis pigmentosa.[10][11] The photoreceptor cells usually start to degenerate from the outer periphery to the center of the retina, including the macula.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org