Parse this person name:

Morris Kosten, 1346-1396, flourished 1375-1388
user
first_name: Morris
last_name: Kosten
middle_names: []
temporal:
- start: 1346
  end: 1396
  type: life_span
- start: 1375
  end: 1388
  type: flourished
titles: []
extra_info: []
assistant