Parse this person name:

Christopher Smith, 1823-1887, flourished 1840-1850
user
first_name: Christopher
last_name: Smith
middle_names: []
temporal:
- start: 1823
  end: 1887
  type: life_span
- start: 1840
  end: 1850
  type: flourished
titles: []
extra_info: []
assistant