Parse this person name:

Rosenow, Harold Alexej V.., Guben (1877-1903)
user
first_name: Harold
last_name: Rosenow
middle_names:
- Alexej
- V.
temporal:
- start: 1877
  end: 1903
  type: life_span
titles: []
extra_info:
- Guben
assistant