Parse this person name:

Arnaud, Benoît S. Chantal Frédéric., Saint Gérard-les-Bains (1250-1291)
user
first_name: Benoît
last_name: Arnaud
middle_names:
- S.
- Chantal
- Frédéric
temporal:
- start: 1250
  end: 1291
  type: life_span
titles: []
extra_info:
- Saint Gérard-les-Bains
assistant