Parse this person name:

Elizabeth van Beek, 1900-1951, flourished 1920-1940
user
first_name: Elizabeth
last_name: van Beek
middle_names: []
temporal:
- start: 1900
  end: 1951
  type: life_span
- start: 1920
  end: 1940
  type: flourished
titles: []
extra_info: []
assistant