Parse this person name:

Sepp Gerritsen, 1352-1409, flourished 1369-1399
user
first_name: Sepp
last_name: Gerritsen
middle_names: []
temporal:
- start: 1352
  end: 1409
  type: life_span
- start: 1369
  end: 1399
  type: flourished
titles: []
extra_info: []
assistant