Parse this person name:

Bjorn Kortman, 1227-1298, flourished 1252-1280
user
first_name: Bjorn
last_name: Kortman
middle_names: []
temporal:
- start: 1227
  end: 1298
  type: life_span
- start: 1252
  end: 1280
  type: flourished
titles: []
extra_info: []
assistant