Parse this person name:

Alexej Mans'Beckmann (1375-1418, flourished 1391-1402)
user
first_name: Alexej
last_name: Mans'Beckmann
middle_names: []
temporal:
- start: 1375
  end: 1418
  type: life_span
- start: 1391
  end: 1402
  type: flourished
titles: []
extra_info: []
assistant