Parse this person name:

Douglas Williams, 1245-1298, flourished 1274-1285
user
first_name: Douglas
last_name: Williams
middle_names: []
temporal:
- start: 1245
  end: 1298
  type: life_span
- start: 1274
  end: 1285
  type: flourished
titles: []
extra_info: []
assistant