Parse this person name:

Geert Köhler, 1366-1409, flourished 1385-1404
user
first_name: Geert
last_name: Köhler
middle_names: []
temporal:
- start: 1366
  end: 1409
  type: life_span
- start: 1385
  end: 1404
  type: flourished
titles: []
extra_info: []
assistant