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