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