Assertion: blindness's cause | /r/HasProperty | multi-layered
Facets:
value: often
type: DEGREE
Source sentences:
text: The current challenge of accurately diagnosing uveitis is that often the cause of a specific ocular inflammation is either unknown or multi-layered.  
text: The current challenge of accurately diagnosing uveitis is that often the cause of a specific ocular inflammation is either unknown or multi-layered.