Parse this person name:

Julian Williams, 1336-1390, flourished 1354-1380
user
first_name: Julian
last_name: Williams
middle_names: []
temporal:
- start: 1336
  end: 1390
  type: life_span
- start: 1354
  end: 1380
  type: flourished
titles: []
extra_info: []
assistant