Parse this person name:

Olivier van der Avoirt, 1426-1493, flourished 1451-1474
user
first_name: Olivier
last_name: van der Avoirt
middle_names: []
temporal:
- start: 1426
  end: 1493
  type: life_span
- start: 1451
  end: 1474
  type: flourished
titles: []
extra_info: []
assistant