Parse this person name:

Mirthe der Kijnder, 1410-1457, flourished 1425-1444
user
first_name: Mirthe
last_name: der Kijnder
middle_names: []
temporal:
- start: 1410
  end: 1457
  type: life_span
- start: 1425
  end: 1444
  type: flourished
titles: []
extra_info: []
assistant