+------------------SUBJ:V-N-----------------+    
      +-----------COMP:N-N(in)-----------+        |    
      +COMP:N-N(of)+         +MOD_ATT:N-A+        |    
      |            |         |           |        |    
 Expression of IGF 2 in parenchymal astrocytes occurs .
COMP:N-N(of) (expression,2)
COMP:N-N(in) (expression,astrocyte)
MOD_ATT:N-ADJ (astrocyte,parenchymal)
SUBJ:V-N (occur,expression)