Parse this person name:

Sylvie Lefebvre, 1373-1420, flourished 1397-1409
user
first_name: Sylvie
last_name: Lefebvre
middle_names: []
temporal:
- start: 1373
  end: 1420
  type: life_span
- start: 1397
  end: 1409
  type: flourished
titles: []
extra_info: []
assistant