SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList (children 1)
      Function in (children 1)
       ExpressionList (children 2)
        Literal NULL
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal NULL