Parse this person name:

Ronald Brown, 1934-1997, flourished 1957-1978
user
first_name: Ronald
last_name: Brown
middle_names: []
temporal:
- start: 1934
  end: 1997
  type: life_span
- start: 1957
  end: 1978
  type: flourished
titles: []
extra_info: []
assistant