Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Context : Sven Gerich The information up to 2007 was retrieved from Die Wiesbadener Oberburgermeister seit dem Bau des neuen Rathauses (1886) (The Wiesbaden Mayors since the construction of the new town mayor hall (1886) )
Answer : Sven Gerich
Who became the leader of Wiesbaden?