Parse this person name:

Ulf D. (Ulf Detlef) Wagenknecht, 1849-1889
user
first_name: Ulf
last_name: Wagenknecht
middle_names:
- Detlef
temporal:
- start: 1849
  end: 1889
  type: life_span
titles: []
extra_info: []
assistant