Parse this person name:

Gianpietro Giacomo C. W. Costanzo Pier Guinizzelli, -1889
user
first_name: Gianpietro
last_name: Guinizzelli
middle_names:
- Giacomo
- C.
- W.
- Costanzo
- Pier
temporal:
- start: null
  end: 1889
  type: life_span
titles: []
extra_info: []
assistant