Parse this person name:

Johanna Ernst, 1816-1894, flourished 1844-1868
user
first_name: Johanna
last_name: Ernst
middle_names: []
temporal:
- start: 1816
  end: 1894
  type: life_span
- start: 1844
  end: 1868
  type: flourished
titles: []
extra_info: []
assistant