Parse this person name:

Boris Spies, 1397-1474, flourished 1426-1453
user
first_name: Boris
last_name: Spies
middle_names: []
temporal:
- start: 1397
  end: 1474
  type: life_span
- start: 1426
  end: 1453
  type: flourished
titles: []
extra_info: []
assistant