Parse this person name:

Jelte Veenstra, 1739-1786, flourished 1754-1767
user
first_name: Jelte
last_name: Veenstra
middle_names: []
temporal:
- start: 1739
  end: 1786
  type: life_span
- start: 1754
  end: 1767
  type: flourished
titles: []
extra_info: []
assistant