Parse this person name:

Iwan Gnatz (1273-1323, flourished 1296-1318)
user
first_name: Iwan
last_name: Gnatz
middle_names: []
temporal:
- start: 1273
  end: 1323
  type: life_span
- start: 1296
  end: 1318
  type: flourished
titles: []
extra_info: []
assistant