Parse this person name:

Burghard Heser, 1451-1499, flourished 1469-1492
user
first_name: Burghard
last_name: Heser
middle_names: []
temporal:
- start: 1451
  end: 1499
  type: life_span
- start: 1469
  end: 1492
  type: flourished
titles: []
extra_info: []
assistant