Parse this person name:

Vera Dussen van (1215-1281, flourished 1239-1260)
user
first_name: Vera
last_name: Dussen van
middle_names: []
temporal:
- start: 1215
  end: 1281
  type: life_span
- start: 1239
  end: 1260
  type: flourished
titles: []
extra_info: []
assistant