Parse this person name:

Lex Cadefau (1251-1321, flourished 1272-1297)
user
first_name: Lex
last_name: Cadefau
middle_names: []
temporal:
- start: 1251
  end: 1321
  type: life_span
- start: 1272
  end: 1297
  type: flourished
titles: []
extra_info: []
assistant