Parse this person name:

Sten van der Velde, 1733-1798, flourished 1753-1775
user
first_name: Sten
last_name: van der Velde
middle_names: []
temporal:
- start: 1733
  end: 1798
  type: life_span
- start: 1753
  end: 1775
  type: flourished
titles: []
extra_info: []
assistant