Parse this person name:

Lizzy van den Assem (1434-1491, flourished 1460-1486)
user
first_name: Lizzy
last_name: van den Assem
middle_names: []
temporal:
- start: 1434
  end: 1491
  type: life_span
- start: 1460
  end: 1486
  type: flourished
titles: []
extra_info: []
assistant