+------------COMP:V-N(in)------------+    
      +------------SUBJ:V-N------------+        +--------MOD_ATT:N-N--------+    
      +-------COMP:N-N(of)-------+     |        |         +---MOD_ATT:N-N---+    
      |           +-MOD_ATT:N-ADJ+     |        |         |   +MOD_ATT:N-ADJ+    
      |           |       +MOD_AT+     |        |         |   |     +MOD_ATT+    
      |           |       |      |     |        |         |   |     |       |    
 Expression of __SP__ __NODE__ mRNA occurs in brain in 6 day old newborn __SP__ .
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-N (__SP__,brain)
MOD_ATT:N-N (__SP__,day)
MOD_ATT:N-ADJ (__SP__,old)
MOD_ATT:N-ADJ (__SP__,newborn)