Parse this person name:

Sylwia Krein, 1727-1774, flourished 1751-1767
user
first_name: Sylwia
last_name: Krein
middle_names: []
temporal:
- start: 1727
  end: 1774
  type: life_span
- start: 1751
  end: 1767
  type: flourished
titles: []
extra_info: []
assistant