Parse this person name:

William Schaefer (1392-1434, flourished 1409-1429)
user
first_name: William
last_name: Schaefer
middle_names: []
temporal:
- start: 1392
  end: 1434
  type: life_span
- start: 1409
  end: 1429
  type: flourished
titles: []
extra_info: []
assistant