Parse this person name:

Joshua van der Plas (1916-1978, flourished 1939-1957)
user
first_name: Joshua
last_name: van der Plas
middle_names: []
temporal:
- start: 1916
  end: 1978
  type: life_span
- start: 1939
  end: 1957
  type: flourished
titles: []
extra_info: []
assistant