Parse this person name:

Saar van de Velden (1906-1951, flourished 1924-1937)
user
first_name: Saar
last_name: van de Velden
middle_names: []
temporal:
- start: 1906
  end: 1951
  type: life_span
- start: 1924
  end: 1937
  type: flourished
titles: []
extra_info: []
assistant