Parse this person name:

Poirier Thierry, Agathe Louise B. V. Étienne, 1714-1740
user
first_name: Agathe
last_name: Poirier Thierry
middle_names:
- Louise
- B.
- V.
- Étienne
temporal:
- start: 1714
  end: 1740
  type: life_span
titles: []
extra_info: []
assistant