Parse this person name:

Berat van Doorn (1425-1492, flourished 1450-1471)
user
first_name: Berat
last_name: van Doorn
middle_names: []
temporal:
- start: 1425
  end: 1492
  type: life_span
- start: 1450
  end: 1471
  type: flourished
titles: []
extra_info: []
assistant