Parse this person name:

Burckhard Graf, 1262-1338, flourished 1292-1310
user
first_name: Burckhard
last_name: Graf
middle_names: []
temporal:
- start: 1262
  end: 1338
  type: life_span
- start: 1292
  end: 1310
  type: flourished
titles: []
extra_info: []
assistant