Parse this person name:

Jens van der Steen (1543-1606, flourished 1570-1587)
user
first_name: Jens
last_name: van der Steen
middle_names: []
temporal:
- start: 1543
  end: 1606
  type: life_span
- start: 1570
  end: 1587
  type: flourished
titles: []
extra_info: []
assistant