Parse this person name:

David Graham, 1769-1848, flourished 1786-1805
user
first_name: David
last_name: Graham
middle_names: []
temporal:
- start: 1769
  end: 1848
  type: life_span
- start: 1786
  end: 1805
  type: flourished
titles: []
extra_info: []
assistant