Parse this person name:

Teun van Vlaanderen, 1229-1291, flourished 1249-1275
user
first_name: Teun
last_name: van Vlaanderen
middle_names: []
temporal:
- start: 1229
  end: 1291
  type: life_span
- start: 1249
  end: 1275
  type: flourished
titles: []
extra_info: []
assistant