Parse this person name:

Sina Dowerg (1851-1926, flourished 1875-1899)
user
first_name: Sina
last_name: Dowerg
middle_names: []
temporal:
- start: 1851
  end: 1926
  type: life_span
- start: 1875
  end: 1899
  type: flourished
titles: []
extra_info: []
assistant