Parse this person name:

Simon de Gruijter, 1394-1465, flourished 1415-1429
user
first_name: Simon
last_name: de Gruijter
middle_names: []
temporal:
- start: 1394
  end: 1465
  type: life_span
- start: 1415
  end: 1429
  type: flourished
titles: []
extra_info: []
assistant