Parse this person name:

Brian Armstrong (1865-1920, flourished 1881-1906)
user
first_name: Brian
last_name: Armstrong
middle_names: []
temporal:
- start: 1865
  end: 1920
  type: life_span
- start: 1881
  end: 1906
  type: flourished
titles: []
extra_info: []
assistant