Parse this person name:

Stephen Allen, 1318-1398, flourished 1334-1353
user
first_name: Stephen
last_name: Allen
middle_names: []
temporal:
- start: 1318
  end: 1398
  type: life_span
- start: 1334
  end: 1353
  type: flourished
titles: []
extra_info: []
assistant