Parse this person name:

Gundolf W. Arnulf Stey, Günzburg, died 1329
user
first_name: Gundolf
last_name: Stey
middle_names:
- W.
- Arnulf
temporal:
- start: null
  end: 1329
  type: life_span
titles: []
extra_info:
- Günzburg
assistant