Parse this person name:

Hertha Stiffel (1218-1265, flourished 1246-1260)
user
first_name: Hertha
last_name: Stiffel
middle_names: []
temporal:
- start: 1218
  end: 1265
  type: life_span
- start: 1246
  end: 1260
  type: flourished
titles: []
extra_info: []
assistant