Parse this person name:

ثامر الحجار (1802-1857, flourished 1819-1831)
user
first_name: ثامر
last_name: الحجار
middle_names: []
temporal:
- start: 1802
  end: 1857
  type: life_span
- start: 1819
  end: 1831
  type: flourished
titles: []
extra_info: []
assistant