Complex sentence: Stacey, p577 Whiting, p.164 On the 15 April the Duke of Wellingtons occupied the city's zoo and upon discovering a live polar bear offered it to their brigade commander, who declined.
Split into simpler sentences: Stacey, p577 Whiting, p.164 On the 15 April the Duke of Wellingtons occupied the city's zoo. Upon discovering a live polar bear they offered it to their brigade commander, who declined.