Parse this person name:

Sandra Hernandez, 1521-1569, flourished 1540-1564
user
first_name: Sandra
last_name: Hernandez
middle_names: []
temporal:
- start: 1521
  end: 1569
  type: life_span
- start: 1540
  end: 1564
  type: flourished
titles: []
extra_info: []
assistant