Parse this person name:

Bertram Pieper, 1446-1511, flourished 1474-1502
user
first_name: Bertram
last_name: Pieper
middle_names: []
temporal:
- start: 1446
  end: 1511
  type: life_span
- start: 1474
  end: 1502
  type: flourished
titles: []
extra_info: []
assistant