Parse this person name:

Burkhardt Berger, 1243-1291, flourished 1269-1282
user
first_name: Burkhardt
last_name: Berger
middle_names: []
temporal:
- start: 1243
  end: 1291
  type: life_span
- start: 1269
  end: 1282
  type: flourished
titles: []
extra_info: []
assistant