Parse this person name:

Jeff Douglas, 1299-1376, flourished 1315-1344
user
first_name: Jeff
last_name: Douglas
middle_names: []
temporal:
- start: 1299
  end: 1376
  type: life_span
- start: 1315
  end: 1344
  type: flourished
titles: []
extra_info: []
assistant