+--MOD_ATT:N-N-+                          +------COMP:N-N(of)------+    
  |      +MOD_ATT+SUBJ:V_PASS+COMP:V_PASS-N(+                +MOD_ATT+    
  |      |       |           |              |                |       |    
 GO : __SP__ __NODE__ is involved in differentiation of epithelial cells .
MOD_ATT:N-N (__NODE__,go)
MOD_ATT:N-ADJ (__NODE__,__SP__)
SUBJ:V_PASS-N (involve,__NODE__)
COMP:V_PASS-N(in) (involve,differentiation)
COMP:N-N(of) (differentiation,cell)
MOD_ATT:N-ADJ (cell,epithelial)