Parse this person name:

Oscar Archer-Pratt, 1850-1892, flourished 1866-1886
user
first_name: Oscar
last_name: Archer-Pratt
middle_names: []
temporal:
- start: 1850
  end: 1892
  type: life_span
- start: 1866
  end: 1886
  type: flourished
titles: []
extra_info: []
assistant