+------------SUBJ:V-N------------+              
       +------COMP:N-N(of)-----+        |              
       |             +MOD_ATT:N+        +COMP:V-N(+    
       |             |         |        |         |    
 Localization of __NODE__ protein(s) occurs in nuclei .
COMP:N-N(of) (localization,protein(s))
MOD_ATT:N-ADJ (protein(s),__NODE__)
SUBJ:V-N (occur,localization)
COMP:V-N(in) (occur,nucleus)