Parse this person name:

Dierk Rosemann, 1400-1455, flourished 1417-1428
user
first_name: Dierk
last_name: Rosemann
middle_names: []
temporal:
- start: 1400
  end: 1455
  type: life_span
- start: 1417
  end: 1428
  type: flourished
titles: []
extra_info: []
assistant