Parse this person name:

Siem Overeem-Aelftrud van Wessex (1877-1918, flourished 1900-1913)
user
first_name: Siem
last_name: Overeem-Aelftrud van Wessex
middle_names: []
temporal:
- start: 1877
  end: 1918
  type: life_span
- start: 1900
  end: 1913
  type: flourished
titles: []
extra_info: []
assistant