Parse this person name:

Julian van Verdun, 1279-1322, flourished 1307-1317
user
first_name: Julian
last_name: van Verdun
middle_names: []
temporal:
- start: 1279
  end: 1322
  type: life_span
- start: 1307
  end: 1317
  type: flourished
titles: []
extra_info: []
assistant