Parse this person name:

Christof Siering, 1821-1875, flourished 1840-1862
user
first_name: Christof
last_name: Siering
middle_names: []
temporal:
- start: 1821
  end: 1875
  type: life_span
- start: 1840
  end: 1862
  type: flourished
titles: []
extra_info: []
assistant