Parse this person name:

Linn de Gratie, 1229-1272, flourished 1246-1259
user
first_name: Linn
last_name: de Gratie
middle_names: []
temporal:
- start: 1229
  end: 1272
  type: life_span
- start: 1246
  end: 1259
  type: flourished
titles: []
extra_info: []
assistant