Parse this person name:

Kira M. (Kira Marten) Sontag-Gierschner, died 1733
user
first_name: Kira
last_name: Sontag-Gierschner
middle_names:
- Marten
temporal:
- start: null
  end: 1733
  type: life_span
titles: []
extra_info: []
assistant