+----COMP:N-N(of)----+     
  +MOD_ATT+-SUBJ:V-N+--OBJ:V-N-+            +MOD_ATT+     
  |       |         |          |            |       |     
 Ifn protein(s) decreases expression of __NODE__ protein .
MOD_ATT:N-N (protein(s),Ifn)
SUBJ:V-N (decrease,protein(s))
OBJ:V-N (decrease,expression)
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,__NODE__)