Parse this person name:

Gustav Knappe, 1903-1962, flourished 1923-1953
user
first_name: Gustav
last_name: Knappe
middle_names: []
temporal:
- start: 1903
  end: 1962
  type: life_span
- start: 1923
  end: 1953
  type: flourished
titles: []
extra_info: []
assistant