Parse this person name:

Sander Zwart (1218-1286, flourished 1234-1260)
user
first_name: Sander
last_name: Zwart
middle_names: []
temporal:
- start: 1218
  end: 1286
  type: life_span
- start: 1234
  end: 1260
  type: flourished
titles: []
extra_info: []
assistant