Parse this person name:

Cynthia Schwartz (1821-1869, flourished 1839-1858)
user
first_name: Cynthia
last_name: Schwartz
middle_names: []
temporal:
- start: 1821
  end: 1869
  type: life_span
- start: 1839
  end: 1858
  type: flourished
titles: []
extra_info: []
assistant