Parse this person name:

Willibald Sontag, 1407-1469, flourished 1425-1443
user
first_name: Willibald
last_name: Sontag
middle_names: []
temporal:
- start: 1407
  end: 1469
  type: life_span
- start: 1425
  end: 1443
  type: flourished
titles: []
extra_info: []
assistant