Parse this person name:

Lucas van Wessex, 1798-1847, flourished 1818-1837
user
first_name: Lucas
last_name: van Wessex
middle_names: []
temporal:
- start: 1798
  end: 1847
  type: life_span
- start: 1818
  end: 1837
  type: flourished
titles: []
extra_info: []
assistant