Question: Social Sounds Music Festival, commonly abbreviated to Social Sounds, is a local music festival showcasing talent from Ireland which takes place in Belfast, County Antrim, Northern Ireland, the main sponsor behind the festival is Heineken Lager Beer (Dutch: "Heineken Pilsener" ), or simply Heineken is a pale lager beer with how much percentage alcohol by volume, produced by the Dutch brewing company Heineken International?
Answer: 5%