Parse this person name:

Benjamin Schultz-Graham (1754-1822, flourished 1775-1793)
user
first_name: Benjamin
last_name: Schultz-Graham
middle_names: []
temporal:
- start: 1754
  end: 1822
  type: life_span
- start: 1775
  end: 1793
  type: flourished
titles: []
extra_info: []
assistant