what is the company which has birkir hólm guðnason and birkir hólm guðnason as key person ?
SELECT DISTINCT var_uri where brack_open var_uri dbp_keyPeople dbr_Birkir_Hólm_Guðnason sep_dot var_uri dbp_keyPeople dbr_Birkir_Hólm_Guðnason sep_dot var_uri a dbo_Company brack_close