Parse this person name:

Ruben Alfonso (1400-1460, flourished 1423-1443)
user
first_name: Ruben
last_name: Alfonso
middle_names: []
temporal:
- start: 1400
  end: 1460
  type: life_span
- start: 1423
  end: 1443
  type: flourished
titles: []
extra_info: []
assistant