Parse this person name:

Käthi Naser (1939-1979, flourished 1956-1974)
user
first_name: Käthi
last_name: Naser
middle_names: []
temporal:
- start: 1939
  end: 1979
  type: life_span
- start: 1956
  end: 1974
  type: flourished
titles: []
extra_info: []
assistant