Parse this person name:

Gertrude Seifert, 1220-1264, flourished 1237-1259
user
first_name: Gertrude
last_name: Seifert
middle_names: []
temporal:
- start: 1220
  end: 1264
  type: life_span
- start: 1237
  end: 1259
  type: flourished
titles: []
extra_info: []
assistant