Parse this person name:

Yfke Olthof (1329-1406, flourished 1354-1366)
user
first_name: Yfke
last_name: Olthof
middle_names: []
temporal:
- start: 1329
  end: 1406
  type: life_span
- start: 1354
  end: 1366
  type: flourished
titles: []
extra_info: []
assistant