Question: Information: - The Battle of Britain (German: "die Luftschlacht um England", literally "Air battle for England") was a combat of the Second World War, when the Royal Air Force (RAF) defended the United Kingdom (UK) against the German Air Force (Luftwaffe) attacks from the end of June 1940. It is described as the first major campaign fought entirely by air forces. The British officially recognise its duration as from 10 July until 31 October 1940 that overlaps with the period of large-scale night attacks known as the Blitz, while German historians do not accept this subdivision and regard it as a campaign lasting from July 1940 to June 1941. - The Central Powers , consisting of Germany, , the Ottoman Empire and Bulgaria hence also known as the Quadruple Alliance was one of the two main factions during World WarI (191418). It faced and was defeated by the Allied Powers that had formed around the Triple Entente, after which it was dissolved. - The Royal Air Force (RAF) is the United Kingdom's aerial warfare force. Formed towards the end of the First World War on 1 April 1918, it is the oldest independent air force in the world. Following victory over the Central Powers in 1918 the RAF emerged as, at the time, the largest air force in the world. Since its formation, the RAF has taken a significant role in British military history, in particular, playing a large part in the Second World War where it fought its most famous campaign, the Battle of Britain. - Wing Commander Andy D. Green OBE BA RAF ( born 30 July 1962 ) is a British Royal Air Force fighter pilot and World Land Speed Record holder . Given the information above, choose from the list below the object entity that exhibits the relation 'country of citizenship' with the subject 'andy green'. Choices: - british - bulgaria - england - germany - united kingdom
Answer:
england