Parse this person name:

Jörgen Gertz (1891-1958, flourished 1907-1918)
user
first_name: Jörgen
last_name: Gertz
middle_names: []
temporal:
- start: 1891
  end: 1958
  type: life_span
- start: 1907
  end: 1918
  type: flourished
titles: []
extra_info: []
assistant