Parse this person name:

Duchesse Robert Guillet, Pereira-sur-Fernandez, 1945-2020
user
first_name: Robert
last_name: Guillet
middle_names: []
temporal:
- start: 1945
  end: 2020
  type: life_span
titles:
- Duchesse
extra_info:
- Pereira-sur-Fernandez
assistant