+----------SUBJ:V-N---------+-COMP:V-N(in)-+    
      +----COMP:N-N(of)---+       |       +MOD_AT+    
      |           +MOD_ATT+       |       |  +MOD+    
      |           |       |       |       |  |   |    
 Expression of __SP__ __NODE__ occurs in 769 P cells .
COMP:N-N(of) (expression,__NODE__)
MOD_ATT:N-ADJ (__NODE__,__SP__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,cell)
MOD_ATT:N-ADJ (cell,@card@)
MOD_ATT:N-N (cell,P)