Parse this person name:

Elvira Antonini (1823-1891, flourished 1840-1850)
user
first_name: Elvira
last_name: Antonini
middle_names: []
temporal:
- start: 1823
  end: 1891
  type: life_span
- start: 1840
  end: 1850
  type: flourished
titles: []
extra_info: []
assistant