Parse this person name:

Liesel Wesack (1761-1807, flourished 1784-1799)
user
first_name: Liesel
last_name: Wesack
middle_names: []
temporal:
- start: 1761
  end: 1807
  type: life_span
- start: 1784
  end: 1799
  type: flourished
titles: []
extra_info: []
assistant