Parse this person name:

Langern Segebahn, Sigmar Valentine Galina Berthold M. N., born 1934
user
first_name: Sigmar
last_name: Langern Segebahn
middle_names:
- Valentine
- Galina
- Berthold
- M.
- N.
temporal:
- start: 1934
  end: null
  type: life_span
titles: []
extra_info: []
assistant