+----------MOD_ATT:N-N---------+            
      |               +--MOD_ATT:N-N-+SUBJ:V-+    
      |               |              |       |    
 Association of cytoskeleton and __NODE__ occurs .
MOD_ATT:N-N (__NODE__,Association)
MOD_ATT:N-N (__NODE__,cytoskeleton)
SUBJ:V-N (occur,__NODE__)