Parse this person name:

Puk van Geffen (1254-1319, flourished 1271-1294)
user
first_name: Puk
last_name: van Geffen
middle_names: []
temporal:
- start: 1254
  end: 1319
  type: life_span
- start: 1271
  end: 1294
  type: flourished
titles: []
extra_info: []
assistant