Parse this person name:

Kai Ernst (1598-1673, flourished 1619-1643)
user
first_name: Kai
last_name: Ernst
middle_names: []
temporal:
- start: 1598
  end: 1673
  type: life_span
- start: 1619
  end: 1643
  type: flourished
titles: []
extra_info: []
assistant