Parse this person name:

Bernt Geißler, 1685-1756, flourished 1706-1721
user
first_name: Bernt
last_name: Geißler
middle_names: []
temporal:
- start: 1685
  end: 1756
  type: life_span
- start: 1706
  end: 1721
  type: flourished
titles: []
extra_info: []
assistant