Parse this person name:

Valentina Stein-Sismondi (1818-1879, flourished 1848-1873)
user
first_name: Valentina
last_name: Stein-Sismondi
middle_names: []
temporal:
- start: 1818
  end: 1879
  type: life_span
- start: 1848
  end: 1873
  type: flourished
titles: []
extra_info: []
assistant