Parse this person name:

Willem Walsteijn, 1622-1669, flourished 1650-1664
user
first_name: Willem
last_name: Walsteijn
middle_names: []
temporal:
- start: 1622
  end: 1669
  type: life_span
- start: 1650
  end: 1664
  type: flourished
titles: []
extra_info: []
assistant