+----------SUBJ:V-N---------+--------COMP:V-N(in)-------+    
      +----COMP:N-N(of)---+       |         +--MOD_ATT:N-ADJ--+    
      |           +MOD_ATT+       |         |        +MOD_ATT:+    
      |           |       |       |         |        |        |    
 Expression of __SP__ __NODE__ occurs in __SP__ testicular tissue .
COMP:N-N(of) (expression,__NODE__)
MOD_ATT:N-ADJ (__NODE__,__SP__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,toilet)
MOD_ATT:N-ADJ (toilet,__SP__)
MOD_ATT:N-ADJ (toilet,testicular)