Parse this person name:

Klaus Peter Graf (1707-1772, flourished 1725-1750)
user
first_name: Klaus Peter
last_name: Graf
middle_names: []
temporal:
- start: 1707
  end: 1772
  type: life_span
- start: 1725
  end: 1750
  type: flourished
titles: []
extra_info: []
assistant