Parse this person name:

Arndt Jäntsch, 1428-1505, flourished 1448-1466
user
first_name: Arndt
last_name: Jäntsch
middle_names: []
temporal:
- start: 1428
  end: 1505
  type: life_span
- start: 1448
  end: 1466
  type: flourished
titles: []
extra_info: []
assistant