Parse this person name:

Douglas Russell (1430-1480, flourished 1450-1473)
user
first_name: Douglas
last_name: Russell
middle_names: []
temporal:
- start: 1430
  end: 1480
  type: life_span
- start: 1450
  end: 1473
  type: flourished
titles: []
extra_info: []
assistant