Parse this person name:

Kriemhild Stiffel, 1285-1337, flourished 1315-1332
user
first_name: Kriemhild
last_name: Stiffel
middle_names: []
temporal:
- start: 1285
  end: 1337
  type: life_span
- start: 1315
  end: 1332
  type: flourished
titles: []
extra_info: []
assistant