Parse this person name:

Jonkman, Jort Dirk., Slenaken (1914-1967)
user
first_name: Jort
last_name: Jonkman
middle_names:
- Dirk
temporal:
- start: 1914
  end: 1967
  type: life_span
titles: []
extra_info:
- Slenaken
assistant