Parse this person name:

Jeffrey Williams, 1931-1978, flourished 1959-1970
user
first_name: Jeffrey
last_name: Williams
middle_names: []
temporal:
- start: 1931
  end: 1978
  type: life_span
- start: 1959
  end: 1970
  type: flourished
titles: []
extra_info: []
assistant