Parse this person name:

Diana Johnson (1421-1491, flourished 1450-1468)
user
first_name: Diana
last_name: Johnson
middle_names: []
temporal:
- start: 1421
  end: 1491
  type: life_span
- start: 1450
  end: 1468
  type: flourished
titles: []
extra_info: []
assistant