Parse this person name:

William Valette, 1920-1975, flourished 1947-1970
user
first_name: William
last_name: Valette
middle_names: []
temporal:
- start: 1920
  end: 1975
  type: life_span
- start: 1947
  end: 1970
  type: flourished
titles: []
extra_info: []
assistant