Complex sentence: Rupert Guinness, the 2nd Earl of Iveagh, presented the Iveagh Gardens to University College, Dublin in 1939, and in 1941, the Gardens were re-united with the college buildings of Earlsfort Terrace.
Split into simpler sentences: Rupert Guinness, the 2nd Earl of Iveagh, presented the Iveagh Gardens to University College, Dublin in 1939. In 1941, the Gardens were re-united with the college buildings of Earlsfort Terrace.