Parse this person name:

Siegried Dowerg, 1263-1318, flourished 1293-1313
user
first_name: Siegried
last_name: Dowerg
middle_names: []
temporal:
- start: 1263
  end: 1318
  type: life_span
- start: 1293
  end: 1313
  type: flourished
titles: []
extra_info: []
assistant