Complex sentence: In 1725 the fief went to Count Giuseppe Ottavio Cacherano Osasco della Rocca; in 1792, his family being without an heir, it returned to the Kingdom of Sardinia.
Split into simpler sentences: In 1725 the fief went to Count Giuseppe Ottavio Cacherano Osasco della Rocca. In 1792, his family remained without an heir and Lanzo went to the Kingdom of Sardinia.