_:vb50938486 . _:vb50938486 "url:http://en.wikipedia.org/wiki/Cogan_syndrome"^^ . _:vb50938486 . _:vb50938486 "An eye disease characterized by nonsyphilitic interstitial keratitis located_in cornea, has_symptom fever, has_symptom fatigue."^^ . _:vb50938486 . _:vb50938486 . _:vb50938486 .