Parse this person name:

Karlheinz Ernst, 1930-1991, flourished 1951-1971
user
first_name: Karlheinz
last_name: Ernst
middle_names: []
temporal:
- start: 1930
  end: 1991
  type: life_span
- start: 1951
  end: 1971
  type: flourished
titles: []
extra_info: []
assistant