Parse this person name:

Lenn van Dommelen, 1261-1312, flourished 1279-1306
user
first_name: Lenn
last_name: van Dommelen
middle_names: []
temporal:
- start: 1261
  end: 1312
  type: life_span
- start: 1279
  end: 1306
  type: flourished
titles: []
extra_info: []
assistant