Parse this person name:

Lex Vertoor, 1539-1608, flourished 1558-1577
user
first_name: Lex
last_name: Vertoor
middle_names: []
temporal:
- start: 1539
  end: 1608
  type: life_span
- start: 1558
  end: 1577
  type: flourished
titles: []
extra_info: []
assistant