how many politicians are there from the city of altar frontal from la seu d'urgell or of the apostles ?
SELECT DISTINCT COUNT attr_open var_uri attr_close where brack_open dbr_Altar_frontal_from_La_Seu_d'Urgell_or_of_The_Apostles dbp_city var_x sep_dot var_x dbo_leaderName var_uri brack_close