Parse this person name:

Siem van 't Riet, 1678-1730, flourished 1696-1708
user
first_name: Siem
last_name: van 't Riet
middle_names: []
temporal:
- start: 1678
  end: 1730
  type: life_span
- start: 1696
  end: 1708
  type: flourished
titles: []
extra_info: []
assistant