Assertion: libretto | /r/HasProperty | attilio regolo
Facets:
Source sentences:
text: After 1730 he was settled in Vienna and turned out more librettos for the imperial theater, until the mid-1740s: Adriano in Siria, Demetrio, Issipile [de], Demofoonte, Olimpiade, La clemenza di Tito, Achille in Sciro, Temistocle, Il re pastore and what he regarded as his finest libretto, Attilio Regolo.