Parse this person name:

Arndt Langern (1915-1964, flourished 1945-1959)
user
first_name: Arndt
last_name: Langern
middle_names: []
temporal:
- start: 1915
  end: 1964
  type: life_span
- start: 1945
  end: 1959
  type: flourished
titles: []
extra_info: []
assistant