Parse this person name:

Aleksandr Plath (1257-1320, flourished 1282-1298)
user
first_name: Aleksandr
last_name: Plath
middle_names: []
temporal:
- start: 1257
  end: 1320
  type: life_span
- start: 1282
  end: 1298
  type: flourished
titles: []
extra_info: []
assistant