Parse this person name:

Karen Johnson, 1787-1854, flourished 1816-1836
user
first_name: Karen
last_name: Johnson
middle_names: []
temporal:
- start: 1787
  end: 1854
  type: life_span
- start: 1816
  end: 1836
  type: flourished
titles: []
extra_info: []
assistant