Parse this person name:

Stefan van den Nuwenhijsen, 1266-1315, flourished 1286-1309
user
first_name: Stefan
last_name: van den Nuwenhijsen
middle_names: []
temporal:
- start: 1266
  end: 1315
  type: life_span
- start: 1286
  end: 1309
  type: flourished
titles: []
extra_info: []
assistant