Parse this person name:

Julius Köster (1446-1512, flourished 1472-1502)
user
first_name: Julius
last_name: Köster
middle_names: []
temporal:
- start: 1446
  end: 1512
  type: life_span
- start: 1472
  end: 1502
  type: flourished
titles: []
extra_info: []
assistant