Parse this person name:

Riley Veenstra, 1841-1893, flourished 1869-1885
user
first_name: Riley
last_name: Veenstra
middle_names: []
temporal:
- start: 1841
  end: 1893
  type: life_span
- start: 1869
  end: 1885
  type: flourished
titles: []
extra_info: []
assistant