Parse this person name:

Gastone Bignami (1424-1493, flourished 1442-1460)
user
first_name: Gastone
last_name: Bignami
middle_names: []
temporal:
- start: 1424
  end: 1493
  type: life_span
- start: 1442
  end: 1460
  type: flourished
titles: []
extra_info: []
assistant