Parse this person name:

Knut Fischer (1214-1277, flourished 1243-1259)
user
first_name: Knut
last_name: Fischer
middle_names: []
temporal:
- start: 1214
  end: 1277
  type: life_span
- start: 1243
  end: 1259
  type: flourished
titles: []
extra_info: []
assistant