Parse this person name:

Keith Meadows (1925-1991, flourished 1940-1958)
user
first_name: Keith
last_name: Meadows
middle_names: []
temporal:
- start: 1925
  end: 1991
  type: life_span
- start: 1940
  end: 1958
  type: flourished
titles: []
extra_info: []
assistant