Parse this person name:

Alain Chevalier (1221-1298, flourished 1246-1273)
user
first_name: Alain
last_name: Chevalier
middle_names: []
temporal:
- start: 1221
  end: 1298
  type: life_span
- start: 1246
  end: 1273
  type: flourished
titles: []
extra_info: []
assistant