Parse this person name:

Franco Walter (1425-1477, flourished 1446-1457)
user
first_name: Franco
last_name: Walter
middle_names: []
temporal:
- start: 1425
  end: 1477
  type: life_span
- start: 1446
  end: 1457
  type: flourished
titles: []
extra_info: []
assistant