Parse this person name:

Alf Benthin, 1690-1732, flourished 1713-1726
user
first_name: Alf
last_name: Benthin
middle_names: []
temporal:
- start: 1690
  end: 1732
  type: life_span
- start: 1713
  end: 1726
  type: flourished
titles: []
extra_info: []
assistant