Parse this person name:

Kerstin Bärer (1229-1287, flourished 1249-1277)
user
first_name: Kerstin
last_name: Bärer
middle_names: []
temporal:
- start: 1229
  end: 1287
  type: life_span
- start: 1249
  end: 1277
  type: flourished
titles: []
extra_info: []
assistant