Question: What does Olympic Air hold a silver ERA award for?
Sentence: Both Aegean Airlines and Olympic Air have won awards for their services; in 2009 and 2011, Aegean Airlines was awarded the "Best regional airline in Europe" award by Skytrax, and also has two gold and one silver awards by the ERA, while Olympic Air holds one silver ERA award for "Airline of the Year" as well as a "Condé Nast Traveller 2011
Answer in sentence: yes