Parse this person name:

Kornelius Schäfer (1728-1774, flourished 1749-1769)
user
first_name: Kornelius
last_name: Schäfer
middle_names: []
temporal:
- start: 1728
  end: 1774
  type: life_span
- start: 1749
  end: 1769
  type: flourished
titles: []
extra_info: []
assistant