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
        Function materialize (children 1)
         ExpressionList (children 1)
          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\'