+------------SUBJ:V-N------------+-----------COMP:V-N(in)-----------+    
      +-------COMP:N-N(of)-------+     |          +-----MOD_ATT:N-ADJ-----+    
      |           +-MOD_ATT:N-ADJ+     |          |        +-MOD_ATT:N-ADJ+    
      |           |       +MOD_AT+     |          |        |      +MOD_ATT+    
      |           |       |      |     |          |        |      |       |    
 Expression of __SP__ __NODE__ mRNA occurs in malignant __SP__ colonic tissue .
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,toilet)
MOD_ATT:N-ADJ (toilet,malignant)
MOD_ATT:N-ADJ (toilet,__SP__)
MOD_ATT:N-ADJ (toilet,colonic)