Parse this person name:

Julien Arnaud, 1787-1856, flourished 1816-1834
user
first_name: Julien
last_name: Arnaud
middle_names: []
temporal:
- start: 1787
  end: 1856
  type: life_span
- start: 1816
  end: 1834
  type: flourished
titles: []
extra_info: []
assistant