Parse this person name:

Otto Gröttner (1518-1575, flourished 1543-1561)
user
first_name: Otto
last_name: Gröttner
middle_names: []
temporal:
- start: 1518
  end: 1575
  type: life_span
- start: 1543
  end: 1561
  type: flourished
titles: []
extra_info: []
assistant