Parse this person name:

Folkert Atzler (1399-1446, flourished 1425-1441)
user
first_name: Folkert
last_name: Atzler
middle_names: []
temporal:
- start: 1399
  end: 1446
  type: life_span
- start: 1425
  end: 1441
  type: flourished
titles: []
extra_info: []
assistant