Parse this person name:

Steffen Schaaf, 1515-1569, flourished 1535-1555
user
first_name: Steffen
last_name: Schaaf
middle_names: []
temporal:
- start: 1515
  end: 1569
  type: life_span
- start: 1535
  end: 1555
  type: flourished
titles: []
extra_info: []
assistant