Parse this person name:

Christopher Todd-Johnson (1791-1853, flourished 1821-1836)
user
first_name: Christopher
last_name: Todd-Johnson
middle_names: []
temporal:
- start: 1791
  end: 1853
  type: life_span
- start: 1821
  end: 1836
  type: flourished
titles: []
extra_info: []
assistant