+-------------COMP:V-N(in)-------------+    
      +----------SUBJ:V-N---------+         +--------MOD_ATT:N-ADJ-------+    
      +----COMP:N-N(of)---+       |         |      +-----MOD_ATT:N-N-----+    
      |           +MOD_ATT+       |         |      |            +MOD_ATT:+    
      |           |       |       |         |      |            |        |    
 Expression of __SP__ __NODE__ occurs in mammary gland from lactating __SP__ .
COMP:N-N(of) (expression,__NODE__)
MOD_ATT:N-ADJ (__NODE__,__SP__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,__SP__)
MOD_ATT:N-ADJ (__SP__,mammary)
MOD_ATT:N-N (__SP__,gland)
MOD_ATT:N-N (__SP__,lactate)