Definition: Compose a new way to ask the same question. The new question must be asking the exact same thing as the original question does. Without any other information, you should be able to tell that the original question and the new question are the same. Preserve bracketed phrases in your new question. You can change the rest of the question provided the above requirements are satisfied. The new question must have a natural, fluent formulation, as if it were composed by a native English speaker. You will be given three pieces of information to help you create better questions. Those are: "Answer": the answer to the question, e.g., "Honolulu". "Answer Type": the type of the answer, e.g., "Location". "Auxiliary Information" is a detailed description of some concepts mentioned in the question, if any.
Input: original question: Which currency does [Burundi] formerly use?
answer: german east african rupie
answer type: Currency.
auxiliary information: Burundi, officially the Republic of Burundi, is a landlocked country in the African Great Lakes region of East Africa, bordered by Rwanda to the north, Tanzania to the east and south, and the Democratic Republic of the Congo to the west. It is also sometimes considered part of Central Africa. Burundi's capital is Bujumbura. Although the country is landlocked, much of the southwestern border is adjacent to Lake Tanganyika. The Twa, Hutu and Tutsi peoples have lived in Burundi for at least five hundred years. For more than 200 years, Burundi had an indigenous kingdom. At the beginning of the twentieth century, Germany colonized the region. After the First World War and Germany's defeat, it ceded the territory to Belgium. The Belgians ruled Burundi and Rwanda as a European colony known as Ruanda-Urundi. Their intervention exacerbated social differences between the Tutsi and Hutu, which contributed to political unrest in the region. Burundi gained independence in 1962 and initially had a monarchy but a series of assassinations, coups, and a general climate of regional instability culminated in the establishment of a republic and one-party state in 1966.

What is the currency formerly used by [Burundi]?