Parse this person name:

Samuel Johnson (1917-1991, flourished 1938-1951)
user
first_name: Samuel
last_name: Johnson
middle_names: []
temporal:
- start: 1917
  end: 1991
  type: life_span
- start: 1938
  end: 1951
  type: flourished
titles: []
extra_info: []
assistant