Parse this person name:

Bernard Riou, 1781-1834, flourished 1803-1827
user
first_name: Bernard
last_name: Riou
middle_names: []
temporal:
- start: 1781
  end: 1834
  type: life_span
- start: 1803
  end: 1827
  type: flourished
titles: []
extra_info: []
assistant