Parse this person name:

Stella Lensen, 1214-1267, flourished 1243-1255
user
first_name: Stella
last_name: Lensen
middle_names: []
temporal:
- start: 1214
  end: 1267
  type: life_span
- start: 1243
  end: 1255
  type: flourished
titles: []
extra_info: []
assistant