Parse this person name:

Margot Tristan Sébastien Lebrun, Tessier, 1938-1995
user
first_name: Margot
last_name: Lebrun
middle_names:
- Tristan
- Sébastien
temporal:
- start: 1938
  end: 1995
  type: life_span
titles: []
extra_info:
- Tessier
assistant