+-------------------SUBJ:V-N------------------+                                       
      +--------------COMP:N-N(of)-------------+     +-----------COMP:V-N(in)-----------+    
      |           +-------MOD_ATT:N-ADJ-------+     |            +----MOD_ATT:N-ADJ----+    
      |           |       +---MOD_ATT:N-ADJ---+     |            |          +MOD_ATT:N-+    
      |           |       |           +MOD_ATT+     |            |          |     +MOD_+    
      |           |       |           |       |     |            |          |     |    |    
 Expression of __SP__ __NODE__ 2 [__NODE__] mRNA occurs in hematopoietic __SP__ stem cells .
COMP:N-N(of) (expression,mRNA)
MOD_ATT:N-ADJ (mRNA,__SP__)
MOD_ATT:N-ADJ (mRNA,__NODE__)
MOD_ATT:N-N (mRNA,[__NODE__])
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,cell)
MOD_ATT:N-ADJ (cell,hematopoietic)
MOD_ATT:N-ADJ (cell,__SP__)
MOD_ATT:N-N (cell,stem)