Parse this person name:

Barkholz Johann, Konrad Inga H. Doris, 1851-1924
user
first_name: Konrad
last_name: Barkholz Johann
middle_names:
- Inga
- H.
- Doris
temporal:
- start: 1851
  end: 1924
  type: life_span
titles: []
extra_info: []
assistant