Parse this person name:

Kenneth Obrien (1784-1856, flourished 1802-1813)
user
first_name: Kenneth
last_name: Obrien
middle_names: []
temporal:
- start: 1784
  end: 1856
  type: life_span
- start: 1802
  end: 1813
  type: flourished
titles: []
extra_info: []
assistant