Parse this person name:

Dittmar Krein-Hellwig (1906-1984, flourished 1931-1943)
user
first_name: Dittmar
last_name: Krein-Hellwig
middle_names: []
temporal:
- start: 1906
  end: 1984
  type: life_span
- start: 1931
  end: 1943
  type: flourished
titles: []
extra_info: []
assistant