Parse this person name:

Amelia van Dokkum, 1209-1265, flourished 1231-1254
user
first_name: Amelia
last_name: van Dokkum
middle_names: []
temporal:
- start: 1209
  end: 1265
  type: life_span
- start: 1231
  end: 1254
  type: flourished
titles: []
extra_info: []
assistant