Parse this person name:

Franscini Niggli, Stefano Stella Piersanti Alessandra, born 1707
user
first_name: Stefano
last_name: Franscini Niggli
middle_names:
- Stella
- Piersanti
- Alessandra
temporal:
- start: 1707
  end: null
  type: life_span
titles: []
extra_info: []
assistant