Parse this person name:

Étienne Riou (1439-1480, flourished 1458-1475)
user
first_name: Étienne
last_name: Riou
middle_names: []
temporal:
- start: 1439
  end: 1480
  type: life_span
- start: 1458
  end: 1475
  type: flourished
titles: []
extra_info: []
assistant