Parse this person name:

Julian de Boer, 1460-1537, flourished 1477-1492
user
first_name: Julian
last_name: de Boer
middle_names: []
temporal:
- start: 1460
  end: 1537
  type: life_span
- start: 1477
  end: 1492
  type: flourished
titles: []
extra_info: []
assistant