+--------------SUBJ:V-N-------------+----------COMP:V-N(in)----------+    
      +--------COMP:N-N(of)-------+       |         +------MOD_ATT:N-N-----+    
      |           +-MOD_ATT:N-ADJ-+       |         |     +---MOD_ATT:N-N--+    
      |           |       +MOD_ATT+       |         |     |    +MOD_ATT:N-N+    
      |           |       |       |       |         |     |    |           |    
 Expression of __SP__ __NODE__ protein occurs in leydig cell tumor from __SP__ .
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,__SP__)
MOD_ATT:N-ADJ (protein,__NODE__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,__SP__)
MOD_ATT:N-N (__SP__,leydig)
MOD_ATT:N-N (__SP__,cell)
MOD_ATT:N-N (__SP__,tumour)