Parse this person name:

Kenneth Frazier, 1691-1740, flourished 1721-1735
user
first_name: Kenneth
last_name: Frazier
middle_names: []
temporal:
- start: 1691
  end: 1740
  type: life_span
- start: 1721
  end: 1735
  type: flourished
titles: []
extra_info: []
assistant