Parse this person name:

Dex van Rijnsbergen, 1343-1389, flourished 1361-1384
user
first_name: Dex
last_name: van Rijnsbergen
middle_names: []
temporal:
- start: 1343
  end: 1389
  type: life_span
- start: 1361
  end: 1384
  type: flourished
titles: []
extra_info: []
assistant