Parse this person name:

Berndt Mentzel, 1381-1421, flourished 1401-1416
user
first_name: Berndt
last_name: Mentzel
middle_names: []
temporal:
- start: 1381
  end: 1421
  type: life_span
- start: 1401
  end: 1416
  type: flourished
titles: []
extra_info: []
assistant