Parse this person name:

Lenn Stettyn (1839-1896, flourished 1866-1886)
user
first_name: Lenn
last_name: Stettyn
middle_names: []
temporal:
- start: 1839
  end: 1896
  type: life_span
- start: 1866
  end: 1886
  type: flourished
titles: []
extra_info: []
assistant