+-----COMP:N-N(of)----+      
   +SUBJ:V+-OBJ:V-N-+           +MOD_ATT:N+      
   |      |         |           |         |      
 LiCl increases activity of __NODE__ protein(s) .
SUBJ:V-N (increase,LiCl)
OBJ:V-N (increase,activity)
COMP:N-N(of) (activity,protein(s))
MOD_ATT:N-ADJ (protein(s),__NODE__)