Parse this person name:

Alegre, Horacio Raimundo B.., León (1503-1547)
user
first_name: Horacio
last_name: Alegre
middle_names:
- Raimundo
- B.
temporal:
- start: 1503
  end: 1547
  type: life_span
titles: []
extra_info:
- León
assistant