_:vb50954448 . . "DOID:5922"^^ . _:vb50954448 . _:vb50954448 . . "disease_ontology"^^ . _:vb50954448 . . "adult brainstem astrocytoma"^^ . "NCI:C6954"^^ . . _:vb50954448 . "UMLS_CUI:C1332191"^^ .