Parse this person name:

Alexander Gregory, 1213-1277, flourished 1235-1252
user
first_name: Alexander
last_name: Gregory
middle_names: []
temporal:
- start: 1213
  end: 1277
  type: life_span
- start: 1235
  end: 1252
  type: flourished
titles: []
extra_info: []
assistant