Parse this person name:

Stephen Johnson-Simmons, 1946-2014, flourished 1964-1990
user
first_name: Stephen
last_name: Johnson-Simmons
middle_names: []
temporal:
- start: 1946
  end: 2014
  type: life_span
- start: 1964
  end: 1990
  type: flourished
titles: []
extra_info: []
assistant