+----------SUBJ:V-N----------+                                       
      +----COMP:N-N(of)----+       +COMP:V-N(in)+                          
      |            +MOD_ATT+       |       +MOD_+MOD_POS+COMP:ADJ-N(t+     
      |            |       |       |       |    |       |            |     
 Expression of __NODE__ protein occurs in S91 cells sensitive to __NODE__ .
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,__NODE__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,cell)
MOD_ATT:N-N (cell,S91)
MOD_POST:N-ADJ (cell,sensitive)
COMP:ADJ-N(to) (sensitive,__NODE__)