Parse this person name:

Tim Krein, 1703-1772, flourished 1720-1736
user
first_name: Tim
last_name: Krein
middle_names: []
temporal:
- start: 1703
  end: 1772
  type: life_span
- start: 1720
  end: 1736
  type: flourished
titles: []
extra_info: []
assistant