Parse this person name:

Finn Schwartsbach-Vallenduuk (1931-1977, flourished 1956-1972)
user
first_name: Finn
last_name: Schwartsbach-Vallenduuk
middle_names: []
temporal:
- start: 1931
  end: 1977
  type: life_span
- start: 1956
  end: 1972
  type: flourished
titles: []
extra_info: []
assistant