Parse this person name:

Gregory Obrien (1882-1927, flourished 1912-1922)
user
first_name: Gregory
last_name: Obrien
middle_names: []
temporal:
- start: 1882
  end: 1927
  type: life_span
- start: 1912
  end: 1922
  type: flourished
titles: []
extra_info: []
assistant