Parse this person name:

Marc Karz-Gnatz (1307-1374, flourished 1334-1345)
user
first_name: Marc
last_name: Karz-Gnatz
middle_names: []
temporal:
- start: 1307
  end: 1374
  type: life_span
- start: 1334
  end: 1345
  type: flourished
titles: []
extra_info: []
assistant