Parse this person name:

Berto Expósito, 1222-1266, flourished 1251-1261
user
first_name: Berto
last_name: Expósito
middle_names: []
temporal:
- start: 1222
  end: 1266
  type: life_span
- start: 1251
  end: 1261
  type: flourished
titles: []
extra_info: []
assistant