Parse this person name:

Gregory Stark (1243-1287, flourished 1264-1281)
user
first_name: Gregory
last_name: Stark
middle_names: []
temporal:
- start: 1243
  end: 1287
  type: life_span
- start: 1264
  end: 1281
  type: flourished
titles: []
extra_info: []
assistant