Parse this person name:

Gottfried Ahmet Sylvester Käthi Lange, -1357
user
first_name: Gottfried
last_name: Lange
middle_names:
- Ahmet
- Sylvester
- Käthi
temporal:
- start: null
  end: 1357
  type: life_span
titles: []
extra_info: []
assistant