Parse this person name:

Alex Vierdag, 1326-1375, flourished 1342-1356
user
first_name: Alex
last_name: Vierdag
middle_names: []
temporal:
- start: 1326
  end: 1375
  type: life_span
- start: 1342
  end: 1356
  type: flourished
titles: []
extra_info: []
assistant