Parse this person name:

Björn Stey-Grein Groth, 1793-1839, flourished 1808-1827
user
first_name: Björn
last_name: Stey-Grein Groth
middle_names: []
temporal:
- start: 1793
  end: 1839
  type: life_span
- start: 1808
  end: 1827
  type: flourished
titles: []
extra_info: []
assistant