Parse this person name:

Gerfried Seifert, 1391-1457, flourished 1414-1436
user
first_name: Gerfried
last_name: Seifert
middle_names: []
temporal:
- start: 1391
  end: 1457
  type: life_span
- start: 1414
  end: 1436
  type: flourished
titles: []
extra_info: []
assistant