Parse this person name:

Dussen van-Gierschner, Roswitha, (1420-1495), 1420-1495
user
first_name: Roswitha
last_name: Dussen van-Gierschner
middle_names: []
temporal:
- start: 1420
  end: 1495
  type: life_span
titles: []
extra_info: []
assistant