Parse this person name:

Alex Gilbert, 1870-1921, flourished 1886-1900
user
first_name: Alex
last_name: Gilbert
middle_names: []
temporal:
- start: 1870
  end: 1921
  type: life_span
- start: 1886
  end: 1900
  type: flourished
titles: []
extra_info: []
assistant