Parse this person name:

Henk Heuser, Ottokar Udo Dittmar Nadine, 1254-1323
user
first_name: Ottokar
last_name: Henk Heuser
middle_names:
- Udo
- Dittmar
- Nadine
temporal:
- start: 1254
  end: 1323
  type: life_span
titles: []
extra_info: []
assistant