Parse this person name:

سعد آل العسكري (1213-1259, flourished 1236-1251)
user
first_name: سعد
last_name: آل العسكري
middle_names: []
temporal:
- start: 1213
  end: 1259
  type: life_span
- start: 1236
  end: 1251
  type: flourished
titles: []
extra_info: []
assistant