Given the question: Information: - Gerda Ring ( 11 May 1891 -- 21 January 1999 ) was a Norwegian - born stage actress and stage producer . She was the daughter of writer Barbra Ring , and married actor and theatre director Halfdan Christensen in 1922 . They were parents of the actors Bab Christensen and Pelle Christensen . - Den Nationale Scene is the largest theatre in Bergen, Norway. Den Nationale Scene is also one of the oldest permanent theatres in Norway. - Halfdan Christensen (12 December 1873 17 September 1950) was a Norwegian stage actor and theatre director. He was married twice, first to actress Gyda Christensen, and later to actress Gerda Ring. He had his stage debut at Den Nationale Scene in 1896. He was among the leading actors at the National Theatre from its opening in 1899, and was theatre director from 1911 to 1923, and again from 1930 to 1933. During the Second World War he had to flee to Sweden, and there he led the theatre "Fri norsk scene" together with his wife Gerda Ring. What object entity has the relation of 'country of citizenship' with the subject 'gerda ring'? Choices: - norway - sweden - writer
The answer is:
norway