Parse this person name:

Ivan de Roos (1912-1954, flourished 1942-1949)
user
first_name: Ivan
last_name: de Roos
middle_names: []
temporal:
- start: 1912
  end: 1954
  type: life_span
- start: 1942
  end: 1949
  type: flourished
titles: []
extra_info: []
assistant