Parse this person name:

Gianfranco Vergerio (1397-1457, flourished 1422-1449)
user
first_name: Gianfranco
last_name: Vergerio
middle_names: []
temporal:
- start: 1397
  end: 1457
  type: life_span
- start: 1422
  end: 1449
  type: flourished
titles: []
extra_info: []
assistant