Parse this person name:

Keith Alvarez (1886-1930, flourished 1902-1925)
user
first_name: Keith
last_name: Alvarez
middle_names: []
temporal:
- start: 1886
  end: 1930
  type: life_span
- start: 1902
  end: 1925
  type: flourished
titles: []
extra_info: []
assistant