Parse this person name:

Sebastian Schleich, 1250-1301, flourished 1275-1289
user
first_name: Sebastian
last_name: Schleich
middle_names: []
temporal:
- start: 1250
  end: 1301
  type: life_span
- start: 1275
  end: 1289
  type: flourished
titles: []
extra_info: []
assistant