an Entity references as follows:
Gravina in Puglia (Italian: [ɡraˈviːna im ˈpuʎʎa]; Barese: Gravéine [ɡraˈviːnə, ɡraˈvejnə]; Latin: Silvium; Ancient Greek: Σιλούϊον, romanized: Siloúïon) is a town and comune of the Metropolitan City of Bari, Apulia, southern Italy.