Complex sentence: On 21 October 2012 Aegean Airlines announced that it had struck a deal to acquire Olympic Air, and the buyout was approved by the European Commission a year later, on 9 October 2013.
Split into simpler sentences: On 21 October 2012 Aegean Airlines announced that it had struck a deal to acquire Olympic Air, pending approval by the European Commission. The buyout was approved by the European Commission almost a year later, on 9 October 2013.