Parse this person name:

Fermín Sáenz (1345-1419, flourished 1366-1386)
user
first_name: Fermín
last_name: Sáenz
middle_names: []
temporal:
- start: 1345
  end: 1419
  type: life_span
- start: 1366
  end: 1386
  type: flourished
titles: []
extra_info: []
assistant