Parse this person name:

Matthew Armstrong (1944-2021, flourished 1971-1994)
user
first_name: Matthew
last_name: Armstrong
middle_names: []
temporal:
- start: 1944
  end: 2021
  type: life_span
- start: 1971
  end: 1994
  type: flourished
titles: []
extra_info: []
assistant