Parse this person name:

Nancy Jones, 1920-1976, flourished 1940-1967
user
first_name: Nancy
last_name: Jones
middle_names: []
temporal:
- start: 1920
  end: 1976
  type: life_span
- start: 1940
  end: 1967
  type: flourished
titles: []
extra_info: []
assistant