Parse this person name:

Tassilo Köster, 1303-1354, flourished 1331-1349
user
first_name: Tassilo
last_name: Köster
middle_names: []
temporal:
- start: 1303
  end: 1354
  type: life_span
- start: 1331
  end: 1349
  type: flourished
titles: []
extra_info: []
assistant