Parse this person name:

Bernt Dowerg (1633-1686, flourished 1650-1675)
user
first_name: Bernt
last_name: Dowerg
middle_names: []
temporal:
- start: 1633
  end: 1686
  type: life_span
- start: 1650
  end: 1675
  type: flourished
titles: []
extra_info: []
assistant