Parse this person name:

Jens van Dokkum (1573-1651, flourished 1600-1612)
user
first_name: Jens
last_name: van Dokkum
middle_names: []
temporal:
- start: 1573
  end: 1651
  type: life_span
- start: 1600
  end: 1612
  type: flourished
titles: []
extra_info: []
assistant