+-------------------COMP:V-N(In)------------------+          
         |       +----------------MOD:V-ADV----------------+          
         |       |          +-----------SUBJ:V-N-----------+          
     +MOD+       |          +-----COMP:N-N(of)-----+       +OBJ:V-+   
     |   |       |          |                      |       |      |   
 In C6 cells , poly I : decreases expression of __SP__ __NODE__ mRNA .
MOD_ATT:N-N (cell,C6)
COMP:N-N(of) (decrease,__SP__)
COMP:V-N(In) (__NODE__,cell)
MOD:V-ADV (__NODE__,poly)
SUBJ:V-N (__NODE__,decrease)
OBJ:V-N (__NODE__,mRNA)