Parse this person name:

Brian Williams (1223-1300, flourished 1241-1259)
user
first_name: Brian
last_name: Williams
middle_names: []
temporal:
- start: 1223
  end: 1300
  type: life_span
- start: 1241
  end: 1259
  type: flourished
titles: []
extra_info: []
assistant