Parse this person name:

Berthold Käster, 1407-1463, flourished 1424-1439
user
first_name: Berthold
last_name: Käster
middle_names: []
temporal:
- start: 1407
  end: 1463
  type: life_span
- start: 1424
  end: 1439
  type: flourished
titles: []
extra_info: []
assistant