Parse this person name:

Bradley Billung-Gerritsen, 1754-1822, flourished 1778-1789
user
first_name: Bradley
last_name: Billung-Gerritsen
middle_names: []
temporal:
- start: 1754
  end: 1822
  type: life_span
- start: 1778
  end: 1789
  type: flourished
titles: []
extra_info: []
assistant