+---------COMP:N-N(of)--------+      
                       |            +--MOD_ATT:N-ADJ-+      
     +SUBJ:V-+-OBJ:V-N-+            |       +MOD_ATT:+      
     |       |         |            |       |        |      
 __NODE__ affects expression of __NODE__ levels [__NODE__] .
SUBJ:V-N (affect,__NODE__)
OBJ:V-N (affect,expression)
COMP:N-N(of) (expression,[__NODE__])
MOD_ATT:N-ADJ ([__NODE__],__NODE__)
MOD_ATT:N-N ([__NODE__],level)