Parse this person name:

Elias de Kok (1521-1581, flourished 1551-1561)
user
first_name: Elias
last_name: de Kok
middle_names: []
temporal:
- start: 1521
  end: 1581
  type: life_span
- start: 1551
  end: 1561
  type: flourished
titles: []
extra_info: []
assistant