SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function dictGet (children 1)
     ExpressionList (children 3)
      Literal \'polygon_dictionary\'
      Literal \'value\'
      Function tuple (children 1)
       ExpressionList (children 2)
        Literal Float64_0.5
        Literal Float64_0.5
