Parse this person name:

Walther Gunpf, 1442-1495, flourished 1457-1469
user
first_name: Walther
last_name: Gunpf
middle_names: []
temporal:
- start: 1442
  end: 1495
  type: life_span
- start: 1457
  end: 1469
  type: flourished
titles: []
extra_info: []
assistant