Parse this person name:

Gerrit van Salmen (1794-1857, flourished 1817-1847)
user
first_name: Gerrit
last_name: van Salmen
middle_names: []
temporal:
- start: 1794
  end: 1857
  type: life_span
- start: 1817
  end: 1847
  type: flourished
titles: []
extra_info: []
assistant