Parse this person name:

Christopher Dean (1778-1827, flourished 1808-1820)
user
first_name: Christopher
last_name: Dean
middle_names: []
temporal:
- start: 1778
  end: 1827
  type: life_span
- start: 1808
  end: 1820
  type: flourished
titles: []
extra_info: []
assistant