Parse this person name:

Rens de Koning (1780-1858, flourished 1797-1821)
user
first_name: Rens
last_name: de Koning
middle_names: []
temporal:
- start: 1780
  end: 1858
  type: life_span
- start: 1797
  end: 1821
  type: flourished
titles: []
extra_info: []
assistant