Parse this person name:

Berto Almazán (1246-1286, flourished 1271-1281)
user
first_name: Berto
last_name: Almazán
middle_names: []
temporal:
- start: 1246
  end: 1286
  type: life_span
- start: 1271
  end: 1281
  type: flourished
titles: []
extra_info: []
assistant