Parse this person name:

Brian Thatcher, 1460-1504, flourished 1476-1492
user
first_name: Brian
last_name: Thatcher
middle_names: []
temporal:
- start: 1460
  end: 1504
  type: life_span
- start: 1476
  end: 1492
  type: flourished
titles: []
extra_info: []
assistant