Parse this person name:

Sigurd Seifert (1730-1788, flourished 1752-1772)
user
first_name: Sigurd
last_name: Seifert
middle_names: []
temporal:
- start: 1730
  end: 1788
  type: life_span
- start: 1752
  end: 1772
  type: flourished
titles: []
extra_info: []
assistant