Information:  - Karlshagen is a Baltic Sea resort in Western Pomerania in the north of the island Usedom. Karlshagen has 3400 inhabitants and lies between Zinnowitz and Peenemünde.  - The Baltic Sea (  ; ) is a sea of the Atlantic Ocean, enclosed by Scandinavia, Finland, the Baltic countries, and the North European Plain. It includes the Gulf of Bothnia, the Bay of Bothnia, the Gulf of Finland, the Gulf of Riga, and the Bay of Gdask. The sea stretches from 53°N to 66°N latitude and from 10°E to 30°E longitude. A mediterranean sea of the Atlantic, with limited water exchange between the two bodies, the Baltic Sea drains through the Danish islands into the Kattegat by way of the straits of Øresund, the Great Belt, and the Little Belt.  - The Peene is a river in Germany. The Westpeene, with Ostpeene as its longer tributary, and Kleine Peene/Teterower Peene (with a "Peene " without specification as its smaller and shorter affluent) flow into Kummerower See (Lake Kummerow), and from there as Peene proper to Anklam and into the Oder Lagoon.  - Usedom is a Baltic Sea island in Pomerania, since 1945 split between Germany and Poland. It is the second biggest Pomeranian island after Rügen and before neighbouring Wolin.  - Dr Walter Thiel ( March 3 , 1910 Breslau - August 18 , 1943 Karlshagen , near Peenemünde ) was a German rocket scientist . Walter Thiel provided the decisive ideas for the A4 rocket engine and his research enabled rockets to head towards space .    Given the information above, choose from the list below the object entity that exhibits the relation 'country of citizenship' with the subject 'walter thiel'.  Choices: - finland  - germany
The answer to this question is:
germany