Parse this person name:

Cynthia Armstrong-Johnson, 1230-1305, flourished 1249-1276
user
first_name: Cynthia
last_name: Armstrong-Johnson
middle_names: []
temporal:
- start: 1230
  end: 1305
  type: life_span
- start: 1249
  end: 1276
  type: flourished
titles: []
extra_info: []
assistant