Parse this person name:

Ian Keijser (1878-1930, flourished 1904-1925)
user
first_name: Ian
last_name: Keijser
middle_names: []
temporal:
- start: 1878
  end: 1930
  type: life_span
- start: 1904
  end: 1925
  type: flourished
titles: []
extra_info: []
assistant