Parse this person name:

Pleun Kerkhof, 1237-1300, flourished 1255-1282
user
first_name: Pleun
last_name: Kerkhof
middle_names: []
temporal:
- start: 1237
  end: 1300
  type: life_span
- start: 1255
  end: 1282
  type: flourished
titles: []
extra_info: []
assistant