Parse this person name:

Oostveen Steenbeek, Finn Bryan Y. Y. Elizabeth, died 1867
user
first_name: Finn
last_name: Oostveen Steenbeek
middle_names:
- Bryan
- Y.
- Y.
- Elizabeth
temporal:
- start: null
  end: 1867
  type: life_span
titles: []
extra_info: []
assistant