Parse this person name:

Merle van Beek, 1424-1472, flourished 1440-1454
user
first_name: Merle
last_name: van Beek
middle_names: []
temporal:
- start: 1424
  end: 1472
  type: life_span
- start: 1440
  end: 1454
  type: flourished
titles: []
extra_info: []
assistant