Parse this person name:

Eckhardt Mentzel-Stey (1691-1750, flourished 1716-1729)
user
first_name: Eckhardt
last_name: Mentzel-Stey
middle_names: []
temporal:
- start: 1691
  end: 1750
  type: life_span
- start: 1716
  end: 1729
  type: flourished
titles: []
extra_info: []
assistant