+----------------SUBJ:V-N----------------+                    
      +----------COMP:N-N(of)----------+       |                    
      |           +----MOD_ATT:N-ADJ---+       |                    
      |           |       +MOD_ATT:N-AD+       +--COMP:V-N(in)-+    
      |           |       |      +MOD_A+       |         +MOD_A+    
      |           |       |      |     |       |         |     |    
 Expression of __SP__ __NODE__ [Me] mRNA(s) occurs in __SP__ liver .
COMP:N-N(of) (expression,mRNA(s))
MOD_ATT:N-ADJ (mRNA(s),__SP__)
MOD_ATT:N-ADJ (mRNA(s),__NODE__)
MOD_ATT:N-N (mRNA(s),[Me])
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,liver)
MOD_ATT:N-ADJ (liver,__SP__)