Parse this person name:

Willem Ketel, 1636-1703, flourished 1666-1679
user
first_name: Willem
last_name: Ketel
middle_names: []
temporal:
- start: 1636
  end: 1703
  type: life_span
- start: 1666
  end: 1679
  type: flourished
titles: []
extra_info: []
assistant