We talk to some Berliners about nationality, language, integration - and where home is.Sidret Yesilkaya was born and bred in Berlin. Her parents are Turkish. Her father came to Germany 46 years ago. He's one of the"Gastarbeiter", the"guest workers"who came to Germany to help rebuild what was then West Germany in the post-war years. Now thirty-two, Sidret works as an interpreter.