Parse this person name:

Jorn Werl-Arnsberg, van-van Dagsburg, flourished 1797-1821
user
first_name: Jorn
last_name: Werl-Arnsberg, van-van Dagsburg
middle_names: []
temporal:
- start: 1797
  end: 1821
  type: flourished
titles: []
extra_info: []
assistant