Parse this person name:

Clayton Stevens, 1440-1488, flourished 1458-1475
user
first_name: Clayton
last_name: Stevens
middle_names: []
temporal:
- start: 1440
  end: 1488
  type: life_span
- start: 1458
  end: 1475
  type: flourished
titles: []
extra_info: []
assistant