Parse this person name:

Alex De Oliveira, 1392-1470, flourished 1421-1447
user
first_name: Alex
last_name: De Oliveira
middle_names: []
temporal:
- start: 1392
  end: 1470
  type: life_span
- start: 1421
  end: 1447
  type: flourished
titles: []
extra_info: []
assistant