Parse this person name:

Donald Graf, 1883-1956, flourished 1912-1933
user
first_name: Donald
last_name: Graf
middle_names: []
temporal:
- start: 1883
  end: 1956
  type: life_span
- start: 1912
  end: 1933
  type: flourished
titles: []
extra_info: []
assistant