Parse this person name:

Mark Williamson, 1245-1304, flourished 1264-1277
user
first_name: Mark
last_name: Williamson
middle_names: []
temporal:
- start: 1245
  end: 1304
  type: life_span
- start: 1264
  end: 1277
  type: flourished
titles: []
extra_info: []
assistant