Read the bio below and try to give details on karsten schubert 's:    - known for       - birth date     - name     - nationality     - birth place     - occupation     Bio: karsten schubert -lrb- born 1961 -rrb- is a german art dealer and publisher working in london , england .
- known for is karsten schubert limited ridinghouse- birth date is 1961- name is karsten schubert- nationality is german- birth place is berlin , germany- occupation is artists ' representative , gallery proprietor and publisher