Parse this person name:

Helmar Barkholz (1475-1542, flourished 1503-1517)
user
first_name: Helmar
last_name: Barkholz
middle_names: []
temporal:
- start: 1475
  end: 1542
  type: life_span
- start: 1503
  end: 1517
  type: flourished
titles: []
extra_info: []
assistant