Parse this person name:

Sönke Wulff (1917-1978, flourished 1941-1964)
user
first_name: Sönke
last_name: Wulff
middle_names: []
temporal:
- start: 1917
  end: 1978
  type: life_span
- start: 1941
  end: 1964
  type: flourished
titles: []
extra_info: []
assistant