Parse this person name:

Stephen Acosta (1843-1900, flourished 1868-1880)
user
first_name: Stephen
last_name: Acosta
middle_names: []
temporal:
- start: 1843
  end: 1900
  type: life_span
- start: 1868
  end: 1880
  type: flourished
titles: []
extra_info: []
assistant