Parse this person name:

Sigfrido Quevedo (1928-1996, flourished 1957-1986)
user
first_name: Sigfrido
last_name: Quevedo
middle_names: []
temporal:
- start: 1928
  end: 1996
  type: life_span
- start: 1957
  end: 1986
  type: flourished
titles: []
extra_info: []
assistant