Parse this person name:

Dex Genefaas, 1423-1481, flourished 1442-1456
user
first_name: Dex
last_name: Genefaas
middle_names: []
temporal:
- start: 1423
  end: 1481
  type: life_span
- start: 1442
  end: 1456
  type: flourished
titles: []
extra_info: []
assistant