Parse this person name:

Lars van Dommelen, 1214-1255, flourished 1237-1250
user
first_name: Lars
last_name: van Dommelen
middle_names: []
temporal:
- start: 1214
  end: 1255
  type: life_span
- start: 1237
  end: 1250
  type: flourished
titles: []
extra_info: []
assistant