Parse this person name:

Siegmar Liebelt, 1818-1867, flourished 1841-1862
user
first_name: Siegmar
last_name: Liebelt
middle_names: []
temporal:
- start: 1818
  end: 1867
  type: life_span
- start: 1841
  end: 1862
  type: flourished
titles: []
extra_info: []
assistant