Parse this person name:

Erna Barkholz (1920-1992, flourished 1950-1970)
user
first_name: Erna
last_name: Barkholz
middle_names: []
temporal:
- start: 1920
  end: 1992
  type: life_span
- start: 1950
  end: 1970
  type: flourished
titles: []
extra_info: []
assistant