Parse this person name:

Hélène Étienne (1776-1839, flourished 1797-1807)
user
first_name: Hélène
last_name: Étienne
middle_names: []
temporal:
- start: 1776
  end: 1839
  type: life_span
- start: 1797
  end: 1807
  type: flourished
titles: []
extra_info: []
assistant