Who were the two people that succeeded Louis II of Italy as the emperor of the Occident?
SELECT ?value1 ?value2 WHERE { wd:Q215204 p:P97 ?s . ?s ps:P97 wd:Q23906200 . ?s pq:P155 ?value1 . ?s pq:P156 ?value2 }
louis ii of italy: Q215204 emperor of occident: Q23906200