Parse this person name:

Lukas van Verdun (1821-1880, flourished 1844-1855)
user
first_name: Lukas
last_name: van Verdun
middle_names: []
temporal:
- start: 1821
  end: 1880
  type: life_span
- start: 1844
  end: 1855
  type: flourished
titles: []
extra_info: []
assistant