+-COMP:N-N(of)-+     
     +SUBJ:+--OBJ:V-N-+        +MOD_A+     
     |     |          |        |     |     
 IGF 1 increases expression of c __NODE__ .
SUBJ:V-N (increase,1)
OBJ:V-N (increase,expression)
COMP:N-N(of) (expression,__NODE__)
MOD_ATT:N-N (__NODE__,c)