Parse this person name:

Alex Le Goff, 1421-1475, flourished 1442-1454
user
first_name: Alex
last_name: Le Goff
middle_names: []
temporal:
- start: 1421
  end: 1475
  type: life_span
- start: 1442
  end: 1454
  type: flourished
titles: []
extra_info: []
assistant