Parse this person name:

Alexandra Sandra S. Nicholas Jeremy Nguyen, Ortizberg, flourished 1426-1456
user
first_name: Alexandra
last_name: Nguyen
middle_names:
- Sandra
- S.
- Nicholas
- Jeremy
temporal:
- start: 1426
  end: 1456
  type: flourished
titles: []
extra_info:
- Ortizberg
assistant