Parse this person name:

van Leuven Maas, Myrthe Isabella Seth, 1205-1260
user
first_name: Myrthe
last_name: van Leuven Maas
middle_names:
- Isabella
- Seth
temporal:
- start: 1205
  end: 1260
  type: life_span
titles: []
extra_info: []
assistant