Parse this person name:

Sybille Köster, 1369-1439, flourished 1396-1413
user
first_name: Sybille
last_name: Köster
middle_names: []
temporal:
- start: 1369
  end: 1439
  type: life_span
- start: 1396
  end: 1413
  type: flourished
titles: []
extra_info: []
assistant