Parse this person name:

Étienne Chevallier (1884-1950, flourished 1911-1937)
user
first_name: Étienne
last_name: Chevallier
middle_names: []
temporal:
- start: 1884
  end: 1950
  type: life_span
- start: 1911
  end: 1937
  type: flourished
titles: []
extra_info: []
assistant