Parse this person name:

van Beaumont-de Boer, Twan E. (Twan Emir), 1474-1516
user
first_name: Twan
last_name: van Beaumont-de Boer
middle_names:
- Emir
temporal:
- start: 1474
  end: 1516
  type: life_span
titles: []
extra_info: []
assistant