which museum exhibits the portrait of sir thomas more by hans holbein the younger ?
select distinct var_uri where brack_open dbr_Portrait_of_Sir_Thomas_More_ attr_open Holbein attr_close dbo_museum var_uri sep_dot dbr_Portrait_of_Sir_Thomas_More_ attr_open Holbein attr_close dbo_author dbr_Hans_Holbein_the_Youngerbrack_close