Parse this person name:

Vegt Bloemendaal, Loek Ruben Kyan Rosa U., 1938-1975
user
first_name: Loek
last_name: Vegt Bloemendaal
middle_names:
- Ruben
- Kyan
- Rosa
- U.
temporal:
- start: 1938
  end: 1975
  type: life_span
titles: []
extra_info: []
assistant