Parse this person name:

Jelte Sprong, 1285-1354, flourished 1315-1340
user
first_name: Jelte
last_name: Sprong
middle_names: []
temporal:
- start: 1285
  end: 1354
  type: life_span
- start: 1315
  end: 1340
  type: flourished
titles: []
extra_info: []
assistant