Parse this person name:

Walli Pergande, 1908-1961, flourished 1923-1940
user
first_name: Walli
last_name: Pergande
middle_names: []
temporal:
- start: 1908
  end: 1961
  type: life_span
- start: 1923
  end: 1940
  type: flourished
titles: []
extra_info: []
assistant