Parse this person name:

Alexandros Walter (1350-1427, flourished 1377-1406)
user
first_name: Alexandros
last_name: Walter
middle_names: []
temporal:
- start: 1350
  end: 1427
  type: life_span
- start: 1377
  end: 1406
  type: flourished
titles: []
extra_info: []
assistant