Parse this person name:

Elias van den Henst (1328-1401, flourished 1354-1374)
user
first_name: Elias
last_name: van den Henst
middle_names: []
temporal:
- start: 1328
  end: 1401
  type: life_span
- start: 1354
  end: 1374
  type: flourished
titles: []
extra_info: []
assistant