Parse this person name:

Gero Kroker, 1755-1815, flourished 1774-1784
user
first_name: Gero
last_name: Kroker
middle_names: []
temporal:
- start: 1755
  end: 1815
  type: life_span
- start: 1774
  end: 1784
  type: flourished
titles: []
extra_info: []
assistant