Parse this person name:

ليث المهنا (1759-1818, flourished 1789-1813)
user
first_name: ليث
last_name: المهنا
middle_names: []
temporal:
- start: 1759
  end: 1818
  type: life_span
- start: 1789
  end: 1813
  type: flourished
titles: []
extra_info: []
assistant