Parse this person name:

Sylvie Coste (1850-1908, flourished 1866-1884)
user
first_name: Sylvie
last_name: Coste
middle_names: []
temporal:
- start: 1850
  end: 1908
  type: life_span
- start: 1866
  end: 1884
  type: flourished
titles: []
extra_info: []
assistant