+------------SUBJ:V-N------------+------------COMP:V-N(in)-----------+          
      +-------COMP:N-N(of)-------+     |         +------MOD_ATT:N-ADJ------+          
      |           +-MOD_ATT:N-ADJ+     |         |       +---MOD_ATT:N-N---+          
      |           |       +MOD_AT+     |         |       |          +MOD_AT+          
      |           |       |      |     |         |       |          |      |          
 Expression of __SP__ __NODE__ mRNA occurs in frontal cortex from adult __SP__ brain .
COMP:N-N(of) (expression,mRNA)
MOD_ATT:N-ADJ (mRNA,__SP__)
MOD_ATT:N-ADJ (mRNA,__NODE__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,__SP__)
MOD_ATT:N-ADJ (__SP__,frontal)
MOD_ATT:N-N (__SP__,cortex)
MOD_ATT:N-N (__SP__,adult)