Parse this person name:

Thijmen Steinmeiern, 1923-2001, flourished 1944-1958
user
first_name: Thijmen
last_name: Steinmeiern
middle_names: []
temporal:
- start: 1923
  end: 2001
  type: life_span
- start: 1944
  end: 1958
  type: flourished
titles: []
extra_info: []
assistant