Parse this person name:

Sydney Johnson (1229-1285, flourished 1249-1264)
user
first_name: Sydney
last_name: Johnson
middle_names: []
temporal:
- start: 1229
  end: 1285
  type: life_span
- start: 1249
  end: 1264
  type: flourished
titles: []
extra_info: []
assistant