Parse this person name:

Youssef Aelftrud van Wessex-Boetet, 1239-1298, flourished 1263-1284
user
first_name: Youssef
last_name: Aelftrud van Wessex-Boetet
middle_names: []
temporal:
- start: 1239
  end: 1298
  type: life_span
- start: 1263
  end: 1284
  type: flourished
titles: []
extra_info: []
assistant