Parse this person name:

Senna van Drenthe (1206-1262, flourished 1236-1250)
user
first_name: Senna
last_name: van Drenthe
middle_names: []
temporal:
- start: 1206
  end: 1262
  type: life_span
- start: 1236
  end: 1250
  type: flourished
titles: []
extra_info: []
assistant