Parse this person name:

Leonard Washington-Graham, 1823-1890, flourished 1852-1867
user
first_name: Leonard
last_name: Washington-Graham
middle_names: []
temporal:
- start: 1823
  end: 1890
  type: life_span
- start: 1852
  end: 1867
  type: flourished
titles: []
extra_info: []
assistant