Parse this person name:

William Marion (1698-1769, flourished 1720-1738)
user
first_name: William
last_name: Marion
middle_names: []
temporal:
- start: 1698
  end: 1769
  type: life_span
- start: 1720
  end: 1738
  type: flourished
titles: []
extra_info: []
assistant