Parse this person name:

David Harper (1897-1968, flourished 1919-1940)
user
first_name: David
last_name: Harper
middle_names: []
temporal:
- start: 1897
  end: 1968
  type: life_span
- start: 1919
  end: 1940
  type: flourished
titles: []
extra_info: []
assistant