Parse this person name:

Alex de Gratie, 1385-1452, flourished 1406-1416
user
first_name: Alex
last_name: de Gratie
middle_names: []
temporal:
- start: 1385
  end: 1452
  type: life_span
- start: 1406
  end: 1416
  type: flourished
titles: []
extra_info: []
assistant