Complex sentence: In 2013, Austrian AOR band Cornerstone covered Smalltown Boy in aid of the "Room to Breathe"-camapaign of the Nottingham City Hospital (UK) and reached number 50 in the Austria Top 75 on 20 December 2013.
Split into simpler sentences: In 2013, Austrian AOR band Cornerstone covered "Smalltown Boy" in aid of the "Room to Breathe", a campaign of the Nottingham City Hospital (UK). Their version reached number 50 in the Austria Top 75 on 20 December 2013.