Parse this person name:

Julian Steinberg, 1318-1359, flourished 1343-1354
user
first_name: Julian
last_name: Steinberg
middle_names: []
temporal:
- start: 1318
  end: 1359
  type: life_span
- start: 1343
  end: 1354
  type: flourished
titles: []
extra_info: []
assistant