Parse this person name:

Thomas Bertrand, 1399-1462, flourished 1423-1437
user
first_name: Thomas
last_name: Bertrand
middle_names: []
temporal:
- start: 1399
  end: 1462
  type: life_span
- start: 1423
  end: 1437
  type: flourished
titles: []
extra_info: []
assistant