Parse this person name:

Steven Ferrell, 1217-1268, flourished 1246-1263
user
first_name: Steven
last_name: Ferrell
middle_names: []
temporal:
- start: 1217
  end: 1268
  type: life_span
- start: 1246
  end: 1263
  type: flourished
titles: []
extra_info: []
assistant