Parse this person name:

Stiffel Hettner, Britta Romy G. T. Valentin P., 1430-1491
user
first_name: Britta
last_name: Stiffel Hettner
middle_names:
- Romy
- G.
- T.
- Valentin
- P.
temporal:
- start: 1430
  end: 1491
  type: life_span
titles: []
extra_info: []
assistant