<http://webisa.webdatacommons.org/prov/428604398>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/199702354> .
<http://webisa.webdatacommons.org/199702354>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<ocutech.com> .
<http://webisa.webdatacommons.org/199702354>	<http://www.w3.org/ns/prov#value>	"However, especially early in the disease there may be no obvious changes in the appearance of the retina." .
<http://webisa.webdatacommons.org/199702354>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .