Parse this person name:

Sergej Wesack, 1681-1729, flourished 1708-1724
user
first_name: Sergej
last_name: Wesack
middle_names: []
temporal:
- start: 1681
  end: 1729
  type: life_span
- start: 1708
  end: 1724
  type: flourished
titles: []
extra_info: []
assistant