Parse this person name:

Youssef de Boer, 1319-1365, flourished 1339-1360
user
first_name: Youssef
last_name: de Boer
middle_names: []
temporal:
- start: 1319
  end: 1365
  type: life_span
- start: 1339
  end: 1360
  type: flourished
titles: []
extra_info: []
assistant