Parse this person name:

Willem Marchand (1921-1991, flourished 1947-1966)
user
first_name: Willem
last_name: Marchand
middle_names: []
temporal:
- start: 1921
  end: 1991
  type: life_span
- start: 1947
  end: 1966
  type: flourished
titles: []
extra_info: []
assistant