Parse this person name:

Julien Lefebvre, 1229-1306, flourished 1247-1269
user
first_name: Julien
last_name: Lefebvre
middle_names: []
temporal:
- start: 1229
  end: 1306
  type: life_span
- start: 1247
  end: 1269
  type: flourished
titles: []
extra_info: []
assistant