Parse this person name:

Burckhard Stiffel, 1950-1993, flourished 1973-1988
user
first_name: Burckhard
last_name: Stiffel
middle_names: []
temporal:
- start: 1950
  end: 1993
  type: life_span
- start: 1973
  end: 1988
  type: flourished
titles: []
extra_info: []
assistant