Parse this person name:

Anne van Wessex (1421-1488, flourished 1441-1453)
user
first_name: Anne
last_name: van Wessex
middle_names: []
temporal:
- start: 1421
  end: 1488
  type: life_span
- start: 1441
  end: 1453
  type: flourished
titles: []
extra_info: []
assistant