Parse this person name:

Amelia van Soest (1227-1290, flourished 1245-1270)
user
first_name: Amelia
last_name: van Soest
middle_names: []
temporal:
- start: 1227
  end: 1290
  type: life_span
- start: 1245
  end: 1270
  type: flourished
titles: []
extra_info: []
assistant