Parse this person name:

Brian Miller, 1257-1308, flourished 1287-1298
user
first_name: Brian
last_name: Miller
middle_names: []
temporal:
- start: 1257
  end: 1308
  type: life_span
- start: 1287
  end: 1298
  type: flourished
titles: []
extra_info: []
assistant