+-----------------SUBJ:V-N-----------------+             
 +------OBJ:V-N------+                      |             
 |        +-SUBJ:V-N-+--OBJ:V-N-+MOD_PO+    +OBJ:V-N+     
 |        |          |          |      |    |       |     
 2 , hexanedione increases expression of __SP__ __NODE__ .
OBJ:V-N (increase,2)
SUBJ:V-N (increase,hexanedione)
OBJ:V-N (increase,expression)
MOD_POST:N-ADJ (expression,of)
SUBJ:V-N (__SP__,2)
OBJ:V-N (__SP__,__NODE__)