Parse this person name:

Aleksandr Killer (1418-1458, flourished 1444-1453)
user
first_name: Aleksandr
last_name: Killer
middle_names: []
temporal:
- start: 1418
  end: 1458
  type: life_span
- start: 1444
  end: 1453
  type: flourished
titles: []
extra_info: []
assistant