Parse this person name:

Laura van Beaumont, 1423-1470, flourished 1443-1461
user
first_name: Laura
last_name: van Beaumont
middle_names: []
temporal:
- start: 1423
  end: 1470
  type: life_span
- start: 1443
  end: 1461
  type: flourished
titles: []
extra_info: []
assistant