Parse this person name:

Casper Dirven, 1449-1511, flourished 1472-1500
user
first_name: Casper
last_name: Dirven
middle_names: []
temporal:
- start: 1449
  end: 1511
  type: life_span
- start: 1472
  end: 1500
  type: flourished
titles: []
extra_info: []
assistant