Parse this person name:

Justin Beck, 1298-1349, flourished 1328-1344
user
first_name: Justin
last_name: Beck
middle_names: []
temporal:
- start: 1298
  end: 1349
  type: life_span
- start: 1328
  end: 1344
  type: flourished
titles: []
extra_info: []
assistant