Parse this person name:

Ehrhard Sontag, 1871-1920, flourished 1893-1914
user
first_name: Ehrhard
last_name: Sontag
middle_names: []
temporal:
- start: 1871
  end: 1920
  type: life_span
- start: 1893
  end: 1914
  type: flourished
titles: []
extra_info: []
assistant