Parse this person name:

Comtesse Alexandre Brun-Gérard, Mercier-les-Bains, 1826-1879
user
first_name: Alexandre
last_name: Brun-Gérard
middle_names: []
temporal:
- start: 1826
  end: 1879
  type: life_span
titles:
- Comtesse
extra_info:
- Mercier-les-Bains
assistant