Parse this person name:

Franjo Sontag (1767-1823, flourished 1794-1807)
user
first_name: Franjo
last_name: Sontag
middle_names: []
temporal:
- start: 1767
  end: 1823
  type: life_span
- start: 1794
  end: 1807
  type: flourished
titles: []
extra_info: []
assistant