Parse this person name:

Cynthia Owens-Johnson, 1231-1278, flourished 1257-1273
user
first_name: Cynthia
last_name: Owens-Johnson
middle_names: []
temporal:
- start: 1231
  end: 1278
  type: life_span
- start: 1257
  end: 1273
  type: flourished
titles: []
extra_info: []
assistant