Parse this person name:

Fleury Mercier, Frédérique Arthur Jacqueline Valentine Gérard William, 1395-1425
user
first_name: Frédérique
last_name: Fleury Mercier
middle_names:
- Arthur
- Jacqueline
- Valentine
- Gérard
- William
temporal:
- start: 1395
  end: 1425
  type: life_span
titles: []
extra_info: []
assistant