Parse this person name:

Berat van Velthoven (1430-1488, flourished 1447-1474)
user
first_name: Berat
last_name: van Velthoven
middle_names: []
temporal:
- start: 1430
  end: 1488
  type: life_span
- start: 1447
  end: 1474
  type: flourished
titles: []
extra_info: []
assistant