Parse this person name:

Robert Obrien, 1785-1856, flourished 1810-1830
user
first_name: Robert
last_name: Obrien
middle_names: []
temporal:
- start: 1785
  end: 1856
  type: life_span
- start: 1810
  end: 1830
  type: flourished
titles: []
extra_info: []
assistant