Parse this person name:

Gijs Knuf (1213-1264, flourished 1236-1255)
user
first_name: Gijs
last_name: Knuf
middle_names: []
temporal:
- start: 1213
  end: 1264
  type: life_span
- start: 1236
  end: 1255
  type: flourished
titles: []
extra_info: []
assistant