Parse this person name:

die Bont van Amstel, Marit Sjoerd, 1423-1486
user
first_name: Marit
last_name: die Bont van Amstel
middle_names:
- Sjoerd
temporal:
- start: 1423
  end: 1486
  type: life_span
titles: []
extra_info: []
assistant