Parse this person name:

Mirte van Westfalen, 1231-1311, flourished 1251-1269
user
first_name: Mirte
last_name: van Westfalen
middle_names: []
temporal:
- start: 1231
  end: 1311
  type: life_span
- start: 1251
  end: 1269
  type: flourished
titles: []
extra_info: []
assistant