Parse this person name:

Ella Gervais (1815-1885, flourished 1830-1853)
user
first_name: Ella
last_name: Gervais
middle_names: []
temporal:
- start: 1815
  end: 1885
  type: life_span
- start: 1830
  end: 1853
  type: flourished
titles: []
extra_info: []
assistant