Parse this person name:

Sarah Allen (1857-1921, flourished 1874-1889)
user
first_name: Sarah
last_name: Allen
middle_names: []
temporal:
- start: 1857
  end: 1921
  type: life_span
- start: 1874
  end: 1889
  type: flourished
titles: []
extra_info: []
assistant