Parse this person name:

Katelyn Johnston (1229-1304, flourished 1248-1267)
user
first_name: Katelyn
last_name: Johnston
middle_names: []
temporal:
- start: 1229
  end: 1304
  type: life_span
- start: 1248
  end: 1267
  type: flourished
titles: []
extra_info: []
assistant