Parse this person name:

Ulf Stey, 1897-1944, flourished 1919-1939
user
first_name: Ulf
last_name: Stey
middle_names: []
temporal:
- start: 1897
  end: 1944
  type: life_span
- start: 1919
  end: 1939
  type: flourished
titles: []
extra_info: []
assistant