Parse this person name:

Magret Juncken (1481-1539, flourished 1505-1523)
user
first_name: Magret
last_name: Juncken
middle_names: []
temporal:
- start: 1481
  end: 1539
  type: life_span
- start: 1505
  end: 1523
  type: flourished
titles: []
extra_info: []
assistant