Parse this person name:

Stephen Miller, 1237-1317, flourished 1267-1291
user
first_name: Stephen
last_name: Miller
middle_names: []
temporal:
- start: 1237
  end: 1317
  type: life_span
- start: 1267
  end: 1291
  type: flourished
titles: []
extra_info: []
assistant