Parse this person name:

Pierre Speer, 1451-1499, flourished 1469-1481
user
first_name: Pierre
last_name: Speer
middle_names: []
temporal:
- start: 1451
  end: 1499
  type: life_span
- start: 1469
  end: 1481
  type: flourished
titles: []
extra_info: []
assistant