Parse this person name:

Mariechen Sager-Kraus, 1400-1458, flourished 1418-1446
user
first_name: Mariechen
last_name: Sager-Kraus
middle_names: []
temporal:
- start: 1400
  end: 1458
  type: life_span
- start: 1418
  end: 1446
  type: flourished
titles: []
extra_info: []
assistant