Question: What city is located 20 km south of Marano sul Panaro and on the south side of the Po Valley?
Sentence (from "Marano sul Panaro"): Marano sul Panaro is a "comune" (municipality) in the Province of Modena in the Italian region Emilia-Romagna, located about 30 km west of Bologna and about 20 km south of Modena.
Relevant evidence: Yes