Parse this person name:

Kirstin Grein Groth, 1804-1863, flourished 1821-1833
user
first_name: Kirstin
last_name: Grein Groth
middle_names: []
temporal:
- start: 1804
  end: 1863
  type: life_span
- start: 1821
  end: 1833
  type: flourished
titles: []
extra_info: []
assistant