+----COMP:V-N(of)----+    
                     |            +SUBJ:V-+    
                     |            |       |    
 Dimerization of __NODE__ and __NODE__ occurs .
COMP:V-N(of) (occur,__NODE__)
SUBJ:V-N (occur,__NODE__)

       +--------MOD_ATT:N-N-------+            
       |             +MOD_ATT:N-AD+SUBJ:V-+    
       |             |            |       |    
 Dimerization of __NODE__ and __NODE__ occurs .
MOD_ATT:N-N (__NODE__,Dimerization)
MOD_ATT:N-ADJ (__NODE__,__NODE__)
SUBJ:V-N (occur,__NODE__)