Question: Guelphs and Ghibellines supported the Pope during which time frame?
Sentence (from "Guelphs and Ghibellines"): The Guelphs and Ghibellines ( ; , also , ; Italian: "guelfi e ghibellini" ] ) were factions supporting the Pope and the Holy Roman Emperor, respectively, in the Italian city-states of central and northern Italy.
Relevant evidence: Yes