Parse this person name:

van Gent-van Dalem, Koen, (1784-1811), 1784-1811
user
first_name: Koen
last_name: van Gent-van Dalem
middle_names: []
temporal:
- start: 1784
  end: 1811
  type: life_span
titles: []
extra_info: []
assistant