About: http://webisa.webdatacommons.org/288731318

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	Translating to the values on an eyechart can be ambiguous because making out letters is a completely different process than seeing limited magnitudes.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com