+------------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-A+        
      |           |       +MOD_AT+     |        |           |   |    +MOD_AT+        
      |           |       |      |     |        |           |   |    |      |        
 Expression of __SP__ __NODE__ mRNA occurs in lens from 8 week old adult __SP__ eye .
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__,lens)
MOD_ATT:N-N (__SP__,week)
MOD_ATT:N-ADJ (__SP__,old)
MOD_ATT:N-N (__SP__,adult)