Parse this person name:

Shaun Stevenson, 1204-1270, flourished 1232-1259
user
first_name: Shaun
last_name: Stevenson
middle_names: []
temporal:
- start: 1204
  end: 1270
  type: life_span
- start: 1232
  end: 1259
  type: flourished
titles: []
extra_info: []
assistant