Parse this person name:

Gregor Briemer, 1778-1843, flourished 1804-1819
user
first_name: Gregor
last_name: Briemer
middle_names: []
temporal:
- start: 1778
  end: 1843
  type: life_span
- start: 1804
  end: 1819
  type: flourished
titles: []
extra_info: []
assistant