Parse this person name:

Liebelt Kroker, Gretl Heiderose Hans-Eberhard Hans-Albert Helmuth O.
user
first_name: Gretl
last_name: Liebelt Kroker
middle_names:
- Heiderose
- Hans-Eberhard
- Hans-Albert
- Helmuth
- O.
temporal: []
titles: []
extra_info: []
assistant