Parse this person name:

Nathan van Wassenaar, 1210-1276, flourished 1228-1245
user
first_name: Nathan
last_name: van Wassenaar
middle_names: []
temporal:
- start: 1210
  end: 1276
  type: life_span
- start: 1228
  end: 1245
  type: flourished
titles: []
extra_info: []
assistant