Parse this person name:

Julien Morvan (1722-1787, flourished 1751-1777)
user
first_name: Julien
last_name: Morvan
middle_names: []
temporal:
- start: 1722
  end: 1787
  type: life_span
- start: 1751
  end: 1777
  type: flourished
titles: []
extra_info: []
assistant