Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Q: 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) )
A: 
Who became the leader of Wiesbaden?