+----COMP:N-N(of)----+     
      +SUBJ:V_PASS-N+COMP:V_PASS+            +MOD_ATT+     
      |             |           |            |       |     
 Lipoprotein is involved in secretion of __NODE__ protein .
SUBJ:V_PASS-N (involve,lipoprotein)
COMP:V_PASS-N(in) (involve,secretion)
COMP:N-N(of) (secretion,protein)
MOD_ATT:N-ADJ (protein,__NODE__)