Parse this person name:

Leon van Poppel (1899-1949, flourished 1926-1944)
user
first_name: Leon
last_name: van Poppel
middle_names: []
temporal:
- start: 1899
  end: 1949
  type: life_span
- start: 1926
  end: 1944
  type: flourished
titles: []
extra_info: []
assistant