Parse this person name:

Ralph Pieper, 1891-1937, flourished 1917-1932
user
first_name: Ralph
last_name: Pieper
middle_names: []
temporal:
- start: 1891
  end: 1937
  type: life_span
- start: 1917
  end: 1932
  type: flourished
titles: []
extra_info: []
assistant