Parse this person name:

Iwona Seifert, 1796-1841, flourished 1817-1836
user
first_name: Iwona
last_name: Seifert
middle_names: []
temporal:
- start: 1796
  end: 1841
  type: life_span
- start: 1817
  end: 1836
  type: flourished
titles: []
extra_info: []
assistant