Parse this person name:

Cilly Gröttner (1754-1811, flourished 1770-1788)
user
first_name: Cilly
last_name: Gröttner
middle_names: []
temporal:
- start: 1754
  end: 1811
  type: life_span
- start: 1770
  end: 1788
  type: flourished
titles: []
extra_info: []
assistant