SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function in (children 1)
     ExpressionList (children 2)
      Function tuple (children 1)
       ExpressionList (children 3)
        Literal UInt64_1
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal UInt64_2
        Literal \'World\'
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 3)
           Function materialize (children 1)
            ExpressionList (children 1)
             Literal UInt64_1
           Literal UInt64_2
           Function materialize (children 1)
            ExpressionList (children 1)
             Literal \'Hello\'