Parse this person name:

Robert Chandler, 1403-1474, flourished 1431-1449
user
first_name: Robert
last_name: Chandler
middle_names: []
temporal:
- start: 1403
  end: 1474
  type: life_span
- start: 1431
  end: 1449
  type: flourished
titles: []
extra_info: []
assistant