Parse this person name:

Günther Röhrdanz, 1926-1974, flourished 1954-1969
user
first_name: Günther
last_name: Röhrdanz
middle_names: []
temporal:
- start: 1926
  end: 1974
  type: life_span
- start: 1954
  end: 1969
  type: flourished
titles: []
extra_info: []
assistant