Parse this person name:

Koen Arens, 1242-1305, flourished 1262-1276
user
first_name: Koen
last_name: Arens
middle_names: []
temporal:
- start: 1242
  end: 1305
  type: life_span
- start: 1262
  end: 1276
  type: flourished
titles: []
extra_info: []
assistant