Parse this person name:

Pleun de Groot, 1326-1377, flourished 1350-1372
user
first_name: Pleun
last_name: de Groot
middle_names: []
temporal:
- start: 1326
  end: 1377
  type: life_span
- start: 1350
  end: 1372
  type: flourished
titles: []
extra_info: []
assistant