Parse this person name:

Klaus Kühnert, 1606-1678, flourished 1636-1652
user
first_name: Klaus
last_name: Kühnert
middle_names: []
temporal:
- start: 1606
  end: 1678
  type: life_span
- start: 1636
  end: 1652
  type: flourished
titles: []
extra_info: []
assistant