Who does Charlemagne, the king of Lombards, follow? And who is he followed by?
SELECT ?value1 ?value2 WHERE { wd:Q3044 p:P97 ?s . ?s ps:P97 wd:Q22997793 . ?s pq:P155 ?value1 . ?s pq:P156 ?value2 }
charlemagne: Q3044 king of lombards: Q22997793