+------------COMP:V-N(of)------------+              
                          |    +------------SUBJ:V-N-----------+              
                          |    +-------OBJ:V-N------+          +-OBJ:V-N-+    
                  +MOD_ATT+    |      +MOD_ATT+SUBJ:+MOD:+     |     +MOD+    
                  |       |    |      |       |     |    |     |     |   |    
 Expression of __SP__ __NODE__ 7 [__NODE__] mRNA occurs in __NODE__ 60 cells .
MOD_ATT:N-ADJ (__NODE__,__SP__)
MOD_ATT:N-N (mRNA,[__NODE__])
OBJ:V-N (occur,7)
SUBJ:V-N (occur,mRNA)
MOD:V-ADV (occur,in)
COMP:V-N(of) (__NODE__,__NODE__)
SUBJ:V-N (__NODE__,7)
OBJ:V-N (__NODE__,cell)
MOD_ATT:N-ADJ (cell,@card@)