Parse this person name:

Mies Krein, Kaspar U. J. Alla, 1910-
user
first_name: Kaspar
last_name: Mies Krein
middle_names:
- U.
- J.
- Alla
temporal:
- start: 1910
  end: null
  type: life_span
titles: []
extra_info: []
assistant