Parse this person name:

David Graham, 1709-1749, flourished 1736-1744
user
first_name: David
last_name: Graham
middle_names: []
temporal:
- start: 1709
  end: 1749
  type: life_span
- start: 1736
  end: 1744
  type: flourished
titles: []
extra_info: []
assistant