+-----------COMP:V-N(in)-----------+    
      +--------------SUBJ:V-N-------------+         +------MOD_ATT:N-ADJ-----+    
      +--------COMP:N-N(of)-------+       |         |      +---MOD_ATT:N-N---+    
      |           +-MOD_ATT:N-ADJ-+       |         |      |      +MOD_ATT:N-+    
      |           |       +MOD_ATT+       |         |      |      |     +MOD_+    
      |           |       |       |       |         |      |      |     |    |    
 Expression of __SP__ __NODE__ protein occurs in __SP__ breast cancer cell lines .
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,line)
MOD_ATT:N-ADJ (line,__SP__)
MOD_ATT:N-N (line,breast)
MOD_ATT:N-N (line,cancer)
MOD_ATT:N-N (line,cell)