Parse this person name:

Constance Maréchal (1820-1867, flourished 1835-1857)
user
first_name: Constance
last_name: Maréchal
middle_names: []
temporal:
- start: 1820
  end: 1867
  type: life_span
- start: 1835
  end: 1857
  type: flourished
titles: []
extra_info: []
assistant