Parse this person name:

Alejandra Becerra, 1721-1794, flourished 1736-1764
user
first_name: Alejandra
last_name: Becerra
middle_names: []
temporal:
- start: 1721
  end: 1794
  type: life_span
- start: 1736
  end: 1764
  type: flourished
titles: []
extra_info: []
assistant