Complex sentence: Sadler's Wells opera presented an English version by Geoffrey Dunn beginning on 16 May, 1960, and the revived D'Oyly Carte Opera Company performed the work in the 1990s.
Split into simpler sentences: Sadler's Wells opera presented an English version by Geoffrey Dunn beginning on 16 May, 1960. The revived D'Oyly Carte Opera Company performed the work in the 1990s.