who is the office holder for constituencies dublin clontarf and dublin central ?
SELECT DISTINCT var_uri where brack_open var_uri dbp_constituency dbr_Dublin_Clontarf_ attr_open Dáil_Éireann_constituency attr_close sep_dot var_uri dbp_constituency dbr_Dublin_Central_ attr_open Dáil_Éireann_constituency attr_close sep_dot var_uri a dbo_OfficeHolder brack_close